Finding the Fourth Proportional to 22,553.12, 31,115.72 and 13,113.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,553.12 : 31,115.72 = 13,113.92 : x
2. Step 2: Convert to fraction form
   22,553.12/31,115.72 = 13,113.92/x
3. Step 3: Cross multiply
   22,553.12x = 31,115.72 × 13,113.92
4. Step 4: Simplify right side
   22,553.12x = 408,049,062.82
5. Step 5: Solve for x
   x = 408,049,062.82/22,553.12
6. Step 6: Final answer
   x = 18,092.80