Finding the Fourth Proportional to 12,359.72, 17,043.62 and 8,587.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,359.72 : 17,043.62 = 8,587.16 : x
2. Step 2: Convert to fraction form
   12,359.72/17,043.62 = 8,587.16/x
3. Step 3: Cross multiply
   12,359.72x = 17,043.62 × 8,587.16
4. Step 4: Simplify right side
   12,359.72x = 146,356,291.92
5. Step 5: Solve for x
   x = 146,356,291.92/12,359.72
6. Step 6: Final answer
   x = 11,841.39