Finding the Fourth Proportional to 71,386.05, 98,514.80 and 39,557

Step by Step Solution

1. Step 1: Write the proportion equation
   71,386.05 : 98,514.80 = 39,557 : x
2. Step 2: Convert to fraction form
   71,386.05/98,514.80 = 39,557/x
3. Step 3: Cross multiply
   71,386.05x = 98,514.80 × 39,557
4. Step 4: Simplify right side
   71,386.05x = 3,896,949,943.60
5. Step 5: Solve for x
   x = 3,896,949,943.60/71,386.05
6. Step 6: Final answer
   x = 54,589.80