Here are the rounded values for $x = 17.72469$:

1. Nearest integer (whole number): $18$
2. 1 decimal place: $17.7$
3. 2 decimal places: $17.72$
4. 3 decimal places: $17.725$
5. 4 decimal places: $17.7247$

Would you like a further breakdown or any clarifications?

Here are 5 relative questions:

1. How do you determine rounding rules for different decimal places?
2. What happens if a number is exactly halfway between two values when rounding?
3. Can you explain the difference between truncating and rounding?
4. How do rounding rules apply to negative numbers?
5. What is the importance of rounding in real-life applications?

Tip: When rounding, always check the next digit to determine whether to round up or down. If the digit is 5 or higher, round up. If it's 4 or lower, round down.