Finding the Fourth Proportional to 99,894.88, 137,861.31 and 57,452.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,894.88 : 137,861.31 = 57,452.50 : x
2. Step 2: Convert to fraction form
   99,894.88/137,861.31 = 57,452.50/x
3. Step 3: Cross multiply
   99,894.88x = 137,861.31 × 57,452.50
4. Step 4: Simplify right side
   99,894.88x = 7,920,476,912.78
5. Step 5: Solve for x
   x = 7,920,476,912.78/99,894.88
6. Step 6: Final answer
   x = 79,288.12