Finding the Fourth Proportional to 8,517.78, 12,766.33 and 4,559.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,517.78 : 12,766.33 = 4,559.31 : x
2. Step 2: Convert to fraction form
   8,517.78/12,766.33 = 4,559.31/x
3. Step 3: Cross multiply
   8,517.78x = 12,766.33 × 4,559.31
4. Step 4: Simplify right side
   8,517.78x = 58,205,612.72
5. Step 5: Solve for x
   x = 58,205,612.72/8,517.78
6. Step 6: Final answer
   x = 6,833.43