Finding the Fourth Proportional to 2,517.50, 3,776.42 and 668.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.50 : 3,776.42 = 668.57 : x
2. Step 2: Convert to fraction form
   2,517.50/3,776.42 = 668.57/x
3. Step 3: Cross multiply
   2,517.50x = 3,776.42 × 668.57
4. Step 4: Simplify right side
   2,517.50x = 2,524,778.89
5. Step 5: Solve for x
   x = 2,524,778.89/2,517.50
6. Step 6: Final answer
   x = 1,002.89