Finding the Fourth Proportional to 31,129.52, 42,957.24 and 16,981.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,129.52 : 42,957.24 = 16,981.52 : x
2. Step 2: Convert to fraction form
   31,129.52/42,957.24 = 16,981.52/x
3. Step 3: Cross multiply
   31,129.52x = 42,957.24 × 16,981.52
4. Step 4: Simplify right side
   31,129.52x = 729,479,230.20
5. Step 5: Solve for x
   x = 729,479,230.20/31,129.52
6. Step 6: Final answer
   x = 23,433.68