Finding the Fourth Proportional to 31,123.61, 42,951.17 and 16,976.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,123.61 : 42,951.17 = 16,976.96 : x
2. Step 2: Convert to fraction form
   31,123.61/42,951.17 = 16,976.96/x
3. Step 3: Cross multiply
   31,123.61x = 42,951.17 × 16,976.96
4. Step 4: Simplify right side
   31,123.61x = 729,180,210.16
5. Step 5: Solve for x
   x = 729,180,210.16/31,123.61
6. Step 6: Final answer
   x = 23,428.52