Finding the Fourth Proportional to 12,659.32, 17,446.66 and 8,402.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,659.32 : 17,446.66 = 8,402.86 : x
2. Step 2: Convert to fraction form
   12,659.32/17,446.66 = 8,402.86/x
3. Step 3: Cross multiply
   12,659.32x = 17,446.66 × 8,402.86
4. Step 4: Simplify right side
   12,659.32x = 146,601,841.45
5. Step 5: Solve for x
   x = 146,601,841.45/12,659.32
6. Step 6: Final answer
   x = 11,580.55