Finding the Fourth Proportional to 8,872.93, 12,250.35 and 5,520.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,872.93 : 12,250.35 = 5,520.31 : x
2. Step 2: Convert to fraction form
   8,872.93/12,250.35 = 5,520.31/x
3. Step 3: Cross multiply
   8,872.93x = 12,250.35 × 5,520.31
4. Step 4: Simplify right side
   8,872.93x = 67,625,729.61
5. Step 5: Solve for x
   x = 67,625,729.61/8,872.93
6. Step 6: Final answer
   x = 7,621.58