Finding the Fourth Proportional to 11,721.29, 16,158.57 and 8,358.27

Step by Step Solution

1. Step 1: Write the proportion equation
   11,721.29 : 16,158.57 = 8,358.27 : x
2. Step 2: Convert to fraction form
   11,721.29/16,158.57 = 8,358.27/x
3. Step 3: Cross multiply
   11,721.29x = 16,158.57 × 8,358.27
4. Step 4: Simplify right side
   11,721.29x = 135,057,689.83
5. Step 5: Solve for x
   x = 135,057,689.83/11,721.29
6. Step 6: Final answer
   x = 11,522.42