Finding the Fourth Proportional to 71,666.42, 98,900.83 and 39,402.38

Step by Step Solution

1. Step 1: Write the proportion equation
   71,666.42 : 98,900.83 = 39,402.38 : x
2. Step 2: Convert to fraction form
   71,666.42/98,900.83 = 39,402.38/x
3. Step 3: Cross multiply
   71,666.42x = 98,900.83 × 39,402.38
4. Step 4: Simplify right side
   71,666.42x = 3,896,928,234.72
5. Step 5: Solve for x
   x = 3,896,928,234.72/71,666.42
6. Step 6: Final answer
   x = 54,375.93