Finding the Fourth Proportional to 9,327.91, 12,872.21 and 5,550.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,327.91 : 12,872.21 = 5,550.21 : x
2. Step 2: Convert to fraction form
   9,327.91/12,872.21 = 5,550.21/x
3. Step 3: Cross multiply
   9,327.91x = 12,872.21 × 5,550.21
4. Step 4: Simplify right side
   9,327.91x = 71,443,404.30
5. Step 5: Solve for x
   x = 71,443,404.30/9,327.91
6. Step 6: Final answer
   x = 7,659.10