Finding the Fourth Proportional to 22,857.50, 31,545.02 and 12,789.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,857.50 : 31,545.02 = 12,789.18 : x
2. Step 2: Convert to fraction form
   22,857.50/31,545.02 = 12,789.18/x
3. Step 3: Cross multiply
   22,857.50x = 31,545.02 × 12,789.18
4. Step 4: Simplify right side
   22,857.50x = 403,434,970.86
5. Step 5: Solve for x
   x = 403,434,970.86/22,857.50
6. Step 6: Final answer
   x = 17,650.00