Finding the Fourth Proportional to 12,661.32, 17,449.42 and 8,404.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.32 : 17,449.42 = 8,404.86 : x
2. Step 2: Convert to fraction form
   12,661.32/17,449.42 = 8,404.86/x
3. Step 3: Cross multiply
   12,661.32x = 17,449.42 × 8,404.86
4. Step 4: Simplify right side
   12,661.32x = 146,659,932.18
5. Step 5: Solve for x
   x = 146,659,932.18/12,661.32
6. Step 6: Final answer
   x = 11,583.31