Finding the Fourth Proportional to 72,096.62, 99,352.79 and 51,915.39

Step by Step Solution

1. Step 1: Write the proportion equation
   72,096.62 : 99,352.79 = 51,915.39 : x
2. Step 2: Convert to fraction form
   72,096.62/99,352.79 = 51,915.39/x
3. Step 3: Cross multiply
   72,096.62x = 99,352.79 × 51,915.39
4. Step 4: Simplify right side
   72,096.62x = 5,157,939,174.55
5. Step 5: Solve for x
   x = 5,157,939,174.55/72,096.62
6. Step 6: Final answer
   x = 71,542.04