Finding the Fourth Proportional to 31,131.43, 42,955.99 and 17,517.57

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.43 : 42,955.99 = 17,517.57 : x
2. Step 2: Convert to fraction form
   31,131.43/42,955.99 = 17,517.57/x
3. Step 3: Cross multiply
   31,131.43x = 42,955.99 × 17,517.57
4. Step 4: Simplify right side
   31,131.43x = 752,484,474.16
5. Step 5: Solve for x
   x = 752,484,474.16/31,131.43
6. Step 6: Final answer
   x = 24,171.22