Finding the Fourth Proportional to 8,981.18, 12,400.68 and 5,449.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,981.18 : 12,400.68 = 5,449.16 : x
2. Step 2: Convert to fraction form
   8,981.18/12,400.68 = 5,449.16/x
3. Step 3: Cross multiply
   8,981.18x = 12,400.68 × 5,449.16
4. Step 4: Simplify right side
   8,981.18x = 67,573,289.43
5. Step 5: Solve for x
   x = 67,573,289.43/8,981.18
6. Step 6: Final answer
   x = 7,523.88