Finding the Fourth Proportional to 12,340.32, 17,020.04 and 8,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,340.32 : 17,020.04 = 8,086.72 : x
2. Step 2: Convert to fraction form
   12,340.32/17,020.04 = 8,086.72/x
3. Step 3: Cross multiply
   12,340.32x = 17,020.04 × 8,086.72
4. Step 4: Simplify right side
   12,340.32x = 137,636,297.87
5. Step 5: Solve for x
   x = 137,636,297.87/12,340.32
6. Step 6: Final answer
   x = 11,153.38