Finding the Fourth Proportional to 8,517.42, 12,767.90 and 2,672.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,517.42 : 12,767.90 = 2,672.64 : x
2. Step 2: Convert to fraction form
   8,517.42/12,767.90 = 2,672.64/x
3. Step 3: Cross multiply
   8,517.42x = 12,767.90 × 2,672.64
4. Step 4: Simplify right side
   8,517.42x = 34,123,986.89
5. Step 5: Solve for x
   x = 34,123,986.89/8,517.42
6. Step 6: Final answer
   x = 4,006.38