Finding the Fourth Proportional to 22,915.72, 34,385.28 and 10,921.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,915.72 : 34,385.28 = 10,921.42 : x
2. Step 2: Convert to fraction form
   22,915.72/34,385.28 = 10,921.42/x
3. Step 3: Cross multiply
   22,915.72x = 34,385.28 × 10,921.42
4. Step 4: Simplify right side
   22,915.72x = 375,536,084.70
5. Step 5: Solve for x
   x = 375,536,084.70/22,915.72
6. Step 6: Final answer
   x = 16,387.71