Finding the Fourth Proportional to 9,057.60, 12,498.48 and 5,078.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.60 : 12,498.48 = 5,078.16 : x
2. Step 2: Convert to fraction form
   9,057.60/12,498.48 = 5,078.16/x
3. Step 3: Cross multiply
   9,057.60x = 12,498.48 × 5,078.16
4. Step 4: Simplify right side
   9,057.60x = 63,469,281.20
5. Step 5: Solve for x
   x = 63,469,281.20/9,057.60
6. Step 6: Final answer
   x = 7,007.30