Finding the Fourth Proportional to 71,387.82, 107,130.16 and 38,131.76

Step by Step Solution

1. Step 1: Write the proportion equation
   71,387.82 : 107,130.16 = 38,131.76 : x
2. Step 2: Convert to fraction form
   71,387.82/107,130.16 = 38,131.76/x
3. Step 3: Cross multiply
   71,387.82x = 107,130.16 × 38,131.76
4. Step 4: Simplify right side
   71,387.82x = 4,085,061,549.88
5. Step 5: Solve for x
   x = 4,085,061,549.88/71,387.82
6. Step 6: Final answer
   x = 57,223.51