Finding the Fourth Proportional to 31,128.92, 42,957.71 and 17,700.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.92 : 42,957.71 = 17,700.18 : x
2. Step 2: Convert to fraction form
   31,128.92/42,957.71 = 17,700.18/x
3. Step 3: Cross multiply
   31,128.92x = 42,957.71 × 17,700.18
4. Step 4: Simplify right side
   31,128.92x = 760,359,082.55
5. Step 5: Solve for x
   x = 760,359,082.55/31,128.92
6. Step 6: Final answer
   x = 24,426.13