Finding the Fourth Proportional to 31,013.73, 42,798.92 and 16,866.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,013.73 : 42,798.92 = 16,866.50 : x
2. Step 2: Convert to fraction form
   31,013.73/42,798.92 = 16,866.50/x
3. Step 3: Cross multiply
   31,013.73x = 42,798.92 × 16,866.50
4. Step 4: Simplify right side
   31,013.73x = 721,867,685.85
5. Step 5: Solve for x
   x = 721,867,685.85/31,013.73
6. Step 6: Final answer
   x = 23,275.75