Finding the Fourth Proportional to 31,105.12, 42,925.12 and 16,957.92

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.12 : 42,925.12 = 16,957.92 : x
2. Step 2: Convert to fraction form
   31,105.12/42,925.12 = 16,957.92/x
3. Step 3: Cross multiply
   31,105.12x = 42,925.12 × 16,957.92
4. Step 4: Simplify right side
   31,105.12x = 727,920,750.95
5. Step 5: Solve for x
   x = 727,920,750.95/31,105.12
6. Step 6: Final answer
   x = 23,401.96