Finding the Fourth Proportional to 8,864.28, 12,232.28 and 5,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,864.28 : 12,232.28 = 5,086.72 : x
2. Step 2: Convert to fraction form
   8,864.28/12,232.28 = 5,086.72/x
3. Step 3: Cross multiply
   8,864.28x = 12,232.28 × 5,086.72
4. Step 4: Simplify right side
   8,864.28x = 62,222,183.32
5. Step 5: Solve for x
   x = 62,222,183.32/8,864.28
6. Step 6: Final answer
   x = 7,019.43