Finding the Fourth Proportional to 22,592.16, 31,178.88 and 13,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,592.16 : 31,178.88 = 13,158.72 : x
2. Step 2: Convert to fraction form
   22,592.16/31,178.88 = 13,158.72/x
3. Step 3: Cross multiply
   22,592.16x = 31,178.88 × 13,158.72
4. Step 4: Simplify right side
   22,592.16x = 410,274,151.83
5. Step 5: Solve for x
   x = 410,274,151.83/22,592.16
6. Step 6: Final answer
   x = 18,160.02