Finding the Fourth Proportional to 12,005.38, 16,569.21 and 8,659.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,005.38 : 16,569.21 = 8,659.30 : x
2. Step 2: Convert to fraction form
   12,005.38/16,569.21 = 8,659.30/x
3. Step 3: Cross multiply
   12,005.38x = 16,569.21 × 8,659.30
4. Step 4: Simplify right side
   12,005.38x = 143,477,760.15
5. Step 5: Solve for x
   x = 143,477,760.15/12,005.38
6. Step 6: Final answer
   x = 11,951.12