Finding the Fourth Proportional to 31,123.89, 42,951.33 and 16,976.97

Step by Step Solution

1. Step 1: Write the proportion equation
   31,123.89 : 42,951.33 = 16,976.97 : x
2. Step 2: Convert to fraction form
   31,123.89/42,951.33 = 16,976.97/x
3. Step 3: Cross multiply
   31,123.89x = 42,951.33 × 16,976.97
4. Step 4: Simplify right side
   31,123.89x = 729,183,440.87
5. Step 5: Solve for x
   x = 729,183,440.87/31,123.89
6. Step 6: Final answer
   x = 23,428.42