Finding the Fourth Proportional to 22,728.50, 31,363.09 and 12,656.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,728.50 : 31,363.09 = 12,656.55 : x
2. Step 2: Convert to fraction form
   22,728.50/31,363.09 = 12,656.55/x
3. Step 3: Cross multiply
   22,728.50x = 31,363.09 × 12,656.55
4. Step 4: Simplify right side
   22,728.50x = 396,948,485.10
5. Step 5: Solve for x
   x = 396,948,485.10/22,728.50
6. Step 6: Final answer
   x = 17,464.79