Finding the Fourth Proportional to 99,957.87, 137,942.00 and 57,515.55

Step by Step Solution

1. Step 1: Write the proportion equation
   99,957.87 : 137,942.00 = 57,515.55 : x
2. Step 2: Convert to fraction form
   99,957.87/137,942.00 = 57,515.55/x
3. Step 3: Cross multiply
   99,957.87x = 137,942.00 × 57,515.55
4. Step 4: Simplify right side
   99,957.87x = 7,933,809,710.52
5. Step 5: Solve for x
   x = 7,933,809,710.52/99,957.87
6. Step 6: Final answer
   x = 79,371.54