Finding the Fourth Proportional to 82,399.80, 113,670 and 52,134.15

Step by Step Solution

1. Step 1: Write the proportion equation
   82,399.80 : 113,670 = 52,134.15 : x
2. Step 2: Convert to fraction form
   82,399.80/113,670 = 52,134.15/x
3. Step 3: Cross multiply
   82,399.80x = 113,670 × 52,134.15
4. Step 4: Simplify right side
   82,399.80x = 5,926,088,830.50
5. Step 5: Solve for x
   x = 5,926,088,830.50/82,399.80
6. Step 6: Final answer
   x = 71,918.73