Finding the Fourth Proportional to 9,039.92, 12,474.78 and 5,061.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,039.92 : 12,474.78 = 5,061.20 : x
2. Step 2: Convert to fraction form
   9,039.92/12,474.78 = 5,061.20/x
3. Step 3: Cross multiply
   9,039.92x = 12,474.78 × 5,061.20
4. Step 4: Simplify right side
   9,039.92x = 63,137,356.54
5. Step 5: Solve for x
   x = 63,137,356.54/9,039.92
6. Step 6: Final answer
   x = 6,984.28