Finding the Fourth Proportional to 8,981.20, 12,387.72 and 5,255.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,981.20 : 12,387.72 = 5,255.92 : x
2. Step 2: Convert to fraction form
   8,981.20/12,387.72 = 5,255.92/x
3. Step 3: Cross multiply
   8,981.20x = 12,387.72 × 5,255.92
4. Step 4: Simplify right side
   8,981.20x = 65,108,865.30
5. Step 5: Solve for x
   x = 65,108,865.30/8,981.20
6. Step 6: Final answer
   x = 7,249.46