Finding the Fourth Proportional to 2,665.18, 3,997.86 and 717.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.18 : 3,997.86 = 717.46 : x
2. Step 2: Convert to fraction form
   2,665.18/3,997.86 = 717.46/x
3. Step 3: Cross multiply
   2,665.18x = 3,997.86 × 717.46
4. Step 4: Simplify right side
   2,665.18x = 2,868,304.64
5. Step 5: Solve for x
   x = 2,868,304.64/2,665.18
6. Step 6: Final answer
   x = 1,076.21