Finding the Fourth Proportional to 10,288.32, 15,410.94 and 8,529.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,288.32 : 15,410.94 = 8,529.15 : x
2. Step 2: Convert to fraction form
   10,288.32/15,410.94 = 8,529.15/x
3. Step 3: Cross multiply
   10,288.32x = 15,410.94 × 8,529.15
4. Step 4: Simplify right side
   10,288.32x = 131,442,218.90
5. Step 5: Solve for x
   x = 131,442,218.90/10,288.32
6. Step 6: Final answer
   x = 12,775.87