Finding the Fourth Proportional to 8,411.91, 12,616.42 and 2,865.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.91 : 12,616.42 = 2,865.29 : x
2. Step 2: Convert to fraction form
   8,411.91/12,616.42 = 2,865.29/x
3. Step 3: Cross multiply
   8,411.91x = 12,616.42 × 2,865.29
4. Step 4: Simplify right side
   8,411.91x = 36,149,631.82
5. Step 5: Solve for x
   x = 36,149,631.82/8,411.91
6. Step 6: Final answer
   x = 4,297.43