Finding the Fourth Proportional to 99,635.76, 137,500.56 and 57,202.56

Step by Step Solution

1. Step 1: Write the proportion equation
   99,635.76 : 137,500.56 = 57,202.56 : x
2. Step 2: Convert to fraction form
   99,635.76/137,500.56 = 57,202.56/x
3. Step 3: Cross multiply
   99,635.76x = 137,500.56 × 57,202.56
4. Step 4: Simplify right side
   99,635.76x = 7,865,384,033.43
5. Step 5: Solve for x
   x = 7,865,384,033.43/99,635.76
6. Step 6: Final answer
   x = 78,941.38