Finding the Fourth Proportional to 71,387.33, 107,129.43 and 38,131.25

Step by Step Solution

1. Step 1: Write the proportion equation
   71,387.33 : 107,129.43 = 38,131.25 : x
2. Step 2: Convert to fraction form
   71,387.33/107,129.43 = 38,131.25/x
3. Step 3: Cross multiply
   71,387.33x = 107,129.43 × 38,131.25
4. Step 4: Simplify right side
   71,387.33x = 4,084,978,542.04
5. Step 5: Solve for x
   x = 4,084,978,542.04/71,387.33
6. Step 6: Final answer
   x = 57,222.74