Finding the Fourth Proportional to 9,042.15, 12,480.41 and 5,458.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.15 : 12,480.41 = 5,458.20 : x
2. Step 2: Convert to fraction form
   9,042.15/12,480.41 = 5,458.20/x
3. Step 3: Cross multiply
   9,042.15x = 12,480.41 × 5,458.20
4. Step 4: Simplify right side
   9,042.15x = 68,120,573.86
5. Step 5: Solve for x
   x = 68,120,573.86/9,042.15
6. Step 6: Final answer
   x = 7,533.67