Finding the Fourth Proportional to 99,761.47, 137,673.76 and 54,442.38

Step by Step Solution

1. Step 1: Write the proportion equation
   99,761.47 : 137,673.76 = 54,442.38 : x
2. Step 2: Convert to fraction form
   99,761.47/137,673.76 = 54,442.38/x
3. Step 3: Cross multiply
   99,761.47x = 137,673.76 × 54,442.38
4. Step 4: Simplify right side
   99,761.47x = 7,495,287,107.89
5. Step 5: Solve for x
   x = 7,495,287,107.89/99,761.47
6. Step 6: Final answer
   x = 75,132.08