Finding the Fourth Proportional to 31,020.80, 42,807.84 and 16,874.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,020.80 : 42,807.84 = 16,874.24 : x
2. Step 2: Convert to fraction form
   31,020.80/42,807.84 = 16,874.24/x
3. Step 3: Cross multiply
   31,020.80x = 42,807.84 × 16,874.24
4. Step 4: Simplify right side
   31,020.80x = 722,349,766.04
5. Step 5: Solve for x
   x = 722,349,766.04/31,020.80
6. Step 6: Final answer
   x = 23,285.98