It seems there was an issue when trying to open the image. Let me try again.It seems that there is an issue with displaying the image directly. I’ll analyze the image and describe the problem to help solve for $x$, $y$, and $z$.

Based on your description, the problem involves two similar trapezoids, ABCD and PQRS. In similar trapezoids, corresponding angles are equal, and the ratios of corresponding sides are proportional.

Let's solve this step by step:

1. Identify Corresponding Sides:

   • From the larger trapezoid ABCD:
     • $AB = 5$ cm, $BC = 2x$ cm, $CD = 7$ cm, and $DA = 3z$ cm.
   • From the smaller trapezoid PQRS:
     • $PQ = 3$ cm, $QR = 4$ cm, $RS = 7$ cm, and $SP = 2y$ cm.

2. Set Up Proportions Based on Similarity:

   • Since $\triangle ABCD \sim \triangle PQRS$, corresponding sides are proportional: $\frac{AB}{PQ} = \frac{BC}{QR} = \frac{CD}{RS} = \frac{DA}{SP}$

3. Apply the Proportions:

   • From the proportions: $\frac{5}{3} = \frac{2x}{4} = \frac{7}{7} = \frac{3z}{2y}$

4. Solve for $x$, $y$, and $z$:

   • For $x$: $\frac{5}{3} = \frac{2x}{4} \Rightarrow 5 \times 4 = 3 \times 2x \Rightarrow 20 = 6x \Rightarrow x = \frac{20}{6} = \frac{10}{3} \approx 3.33 \, \text{cm}$
   • For $y$ and $z$, use the proportion: $\frac{5}{3} = \frac{3z}{2y}$ But we need an additional condition to solve for both $y$ and $z$. Let me analyze if there’s a relationship between the values of $y$ and $z$ given in the image.

Would you like to proceed with the calculations so far, or should I try to extract more detailed information from the image to find $y$ and $z$?