Finding the Fourth Proportional to 71,842.95, 99,139.37 and 39,571.29

Step by Step Solution

1. Step 1: Write the proportion equation
   71,842.95 : 99,139.37 = 39,571.29 : x
2. Step 2: Convert to fraction form
   71,842.95/99,139.37 = 39,571.29/x
3. Step 3: Cross multiply
   71,842.95x = 99,139.37 × 39,571.29
4. Step 4: Simplify right side
   71,842.95x = 3,923,072,562.83
5. Step 5: Solve for x
   x = 3,923,072,562.83/71,842.95
6. Step 6: Final answer
   x = 54,606.23