Finding the Fourth Proportional to 8,480.72, 12,699.32 and 5,550.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,480.72 : 12,699.32 = 5,550.48 : x
2. Step 2: Convert to fraction form
   8,480.72/12,699.32 = 5,550.48/x
3. Step 3: Cross multiply
   8,480.72x = 12,699.32 × 5,550.48
4. Step 4: Simplify right side
   8,480.72x = 70,487,321.67
5. Step 5: Solve for x
   x = 70,487,321.67/8,480.72
6. Step 6: Final answer
   x = 8,311.48