Finding the Fourth Proportional to 8,880.16, 12,254.15 and 5,522.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,880.16 : 12,254.15 = 5,522.88 : x
2. Step 2: Convert to fraction form
   8,880.16/12,254.15 = 5,522.88/x
3. Step 3: Cross multiply
   8,880.16x = 12,254.15 × 5,522.88
4. Step 4: Simplify right side
   8,880.16x = 67,678,199.95
5. Step 5: Solve for x
   x = 67,678,199.95/8,880.16
6. Step 6: Final answer
   x = 7,621.28