Finding the Fourth Proportional to 10,509.24, 15,785.72 and 8,868.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,509.24 : 15,785.72 = 8,868.96 : x
2. Step 2: Convert to fraction form
   10,509.24/15,785.72 = 8,868.96/x
3. Step 3: Cross multiply
   10,509.24x = 15,785.72 × 8,868.96
4. Step 4: Simplify right side
   10,509.24x = 140,002,919.25
5. Step 5: Solve for x
   x = 140,002,919.25/10,509.24
6. Step 6: Final answer
   x = 13,321.89