Finding the Fourth Proportional to 9,143.15, 12,617.61 and 5,787.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.15 : 12,617.61 = 5,787.41 : x
2. Step 2: Convert to fraction form
   9,143.15/12,617.61 = 5,787.41/x
3. Step 3: Cross multiply
   9,143.15x = 12,617.61 × 5,787.41
4. Step 4: Simplify right side
   9,143.15x = 73,023,282.29
5. Step 5: Solve for x
   x = 73,023,282.29/9,143.15
6. Step 6: Final answer
   x = 7,986.67