Finding the Fourth Proportional to 22,520.50, 31,080.17 and 12,450.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,520.50 : 31,080.17 = 12,450.91 : x
2. Step 2: Convert to fraction form
   22,520.50/31,080.17 = 12,450.91/x
3. Step 3: Cross multiply
   22,520.50x = 31,080.17 × 12,450.91
4. Step 4: Simplify right side
   22,520.50x = 386,976,399.45
5. Step 5: Solve for x
   x = 386,976,399.45/22,520.50
6. Step 6: Final answer
   x = 17,183.30