Finding the Fourth Proportional to 2,662.34, 3,993.78 and 714.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.34 : 3,993.78 = 714.74 : x
2. Step 2: Convert to fraction form
   2,662.34/3,993.78 = 714.74/x
3. Step 3: Cross multiply
   2,662.34x = 3,993.78 × 714.74
4. Step 4: Simplify right side
   2,662.34x = 2,854,514.32
5. Step 5: Solve for x
   x = 2,854,514.32/2,662.34
6. Step 6: Final answer
   x = 1,072.18