Finding the Fourth Proportional to 71,499, 98,680.38 and 39,678.14

Step by Step Solution

1. Step 1: Write the proportion equation
   71,499 : 98,680.38 = 39,678.14 : x
2. Step 2: Convert to fraction form
   71,499/98,680.38 = 39,678.14/x
3. Step 3: Cross multiply
   71,499x = 98,680.38 × 39,678.14
4. Step 4: Simplify right side
   71,499x = 3,915,453,932.89
5. Step 5: Solve for x
   x = 3,915,453,932.89/71,499
6. Step 6: Final answer
   x = 54,762.36