Finding the Fourth Proportional to 99,915.57, 137,881.71 and 54,592.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,915.57 : 137,881.71 = 54,592.47 : x
2. Step 2: Convert to fraction form
   99,915.57/137,881.71 = 54,592.47/x
3. Step 3: Cross multiply
   99,915.57x = 137,881.71 × 54,592.47
4. Step 4: Simplify right side
   99,915.57x = 7,527,303,116.72
5. Step 5: Solve for x
   x = 7,527,303,116.72/99,915.57
6. Step 6: Final answer
   x = 75,336.64