The problem involves determining the tensile forces in a system of cords, where various weights are suspended, and the angles between the cords are provided. This type of problem is typically solved by resolving forces into their horizontal and vertical components and applying the conditions of static equilibrium:

1. Sum of forces in the horizontal direction (ΣFx) = 0
2. Sum of forces in the vertical direction (ΣFy) = 0

Steps to solve:

1. Identify the forces:

   • The system involves four tensile forces: $A$, $B$, $C$, and $D$.
   • The weights acting at the knots (e.g., 300 lb, 400 lb) create a downward force that must be balanced by the tensions in the cords.

2. Resolve the forces into components:

   • Each force has a horizontal and vertical component based on the given angles.
   • Use trigonometric relationships to decompose the forces:
     • Horizontal component: $F_x = F \cdot \cos(\theta)$
     • Vertical component: $F_y = F \cdot \sin(\theta)$

3. Set up equilibrium equations:

   • For each knot, sum the horizontal and vertical components separately and set them equal to zero.

4. Solve the system of equations to find the unknown tensile forces.

Since the values of the tensile forces are already given in the image (A = 846.41 lb, B = 914.16 lb, C = 207.05 lb, D = 400 lb), we can verify the solution by checking the equilibrium of the system.

If you'd like, I can walk through the detailed calculation process to confirm these values. Would you like to proceed with that? Alternatively, you may have any other questions related to this problem.