Finding the Fourth Proportional to 71,678.72, 98,908 and 39,843.52

Step by Step Solution

1. Step 1: Write the proportion equation
   71,678.72 : 98,908 = 39,843.52 : x
2. Step 2: Convert to fraction form
   71,678.72/98,908 = 39,843.52/x
3. Step 3: Cross multiply
   71,678.72x = 98,908 × 39,843.52
4. Step 4: Simplify right side
   71,678.72x = 3,940,842,876.16
5. Step 5: Solve for x
   x = 3,940,842,876.16/71,678.72
6. Step 6: Final answer
   x = 54,979.26