Finding the Fourth Proportional to 71,541.78, 98,728.82 and 39,279.38

Step by Step Solution

1. Step 1: Write the proportion equation
   71,541.78 : 98,728.82 = 39,279.38 : x
2. Step 2: Convert to fraction form
   71,541.78/98,728.82 = 39,279.38/x
3. Step 3: Cross multiply
   71,541.78x = 98,728.82 × 39,279.38
4. Step 4: Simplify right side
   71,541.78x = 3,878,006,147.69
5. Step 5: Solve for x
   x = 3,878,006,147.69/71,541.78
6. Step 6: Final answer
   x = 54,206.17