Finding the Fourth Proportional to 12,662.32, 17,450.80 and 8,405.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,662.32 : 17,450.80 = 8,405.86 : x
2. Step 2: Convert to fraction form
   12,662.32/17,450.80 = 8,405.86/x
3. Step 3: Cross multiply
   12,662.32x = 17,450.80 × 8,405.86
4. Step 4: Simplify right side
   12,662.32x = 146,688,981.69
5. Step 5: Solve for x
   x = 146,688,981.69/12,662.32
6. Step 6: Final answer
   x = 11,584.68