Finding the Fourth Proportional to 8,724.56, 13,086.68 and 2,150.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,724.56 : 13,086.68 = 2,150.78 : x
2. Step 2: Convert to fraction form
   8,724.56/13,086.68 = 2,150.78/x
3. Step 3: Cross multiply
   8,724.56x = 13,086.68 × 2,150.78
4. Step 4: Simplify right side
   8,724.56x = 28,146,569.61
5. Step 5: Solve for x
   x = 28,146,569.61/8,724.56
6. Step 6: Final answer
   x = 3,226.13