Finding the Fourth Proportional to 9,057.47, 12,498.58 and 5,078.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.47 : 12,498.58 = 5,078.04 : x
2. Step 2: Convert to fraction form
   9,057.47/12,498.58 = 5,078.04/x
3. Step 3: Cross multiply
   9,057.47x = 12,498.58 × 5,078.04
4. Step 4: Simplify right side
   9,057.47x = 63,468,276.49
5. Step 5: Solve for x
   x = 63,468,276.49/9,057.47
6. Step 6: Final answer
   x = 7,007.28