Finding the Fourth Proportional to 22,512.31, 31,068.86 and 12,442.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,512.31 : 31,068.86 = 12,442.72 : x
2. Step 2: Convert to fraction form
   22,512.31/31,068.86 = 12,442.72/x
3. Step 3: Cross multiply
   22,512.31x = 31,068.86 × 12,442.72
4. Step 4: Simplify right side
   22,512.31x = 386,581,125.70
5. Step 5: Solve for x
   x = 386,581,125.70/22,512.31
6. Step 6: Final answer
   x = 17,171.99