Finding the Fourth Proportional to 2,662.43, 3,993.93 and 714.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.43 : 3,993.93 = 714.78 : x
2. Step 2: Convert to fraction form
   2,662.43/3,993.93 = 714.78/x
3. Step 3: Cross multiply
   2,662.43x = 3,993.93 × 714.78
4. Step 4: Simplify right side
   2,662.43x = 2,854,781.29
5. Step 5: Solve for x
   x = 2,854,781.29/2,662.43
6. Step 6: Final answer
   x = 1,072.25