Finding the Fourth Proportional to 71,567.48, 98,754.72 and 39,728.54

Step by Step Solution

1. Step 1: Write the proportion equation
   71,567.48 : 98,754.72 = 39,728.54 : x
2. Step 2: Convert to fraction form
   71,567.48/98,754.72 = 39,728.54/x
3. Step 3: Cross multiply
   71,567.48x = 98,754.72 × 39,728.54
4. Step 4: Simplify right side
   71,567.48x = 3,923,380,843.71
5. Step 5: Solve for x
   x = 3,923,380,843.71/71,567.48
6. Step 6: Final answer
   x = 54,820.72