Finding the Fourth Proportional to 9,879.52, 13,633.68 and 5,403.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879.52 : 13,633.68 = 5,403.20 : x
2. Step 2: Convert to fraction form
   9,879.52/13,633.68 = 5,403.20/x
3. Step 3: Cross multiply
   9,879.52x = 13,633.68 × 5,403.20
4. Step 4: Simplify right side
   9,879.52x = 73,665,499.78
5. Step 5: Solve for x
   x = 73,665,499.78/9,879.52
6. Step 6: Final answer
   x = 7,456.38