Finding the Fourth Proportional to 2,665.49, 3,998.23 and 717.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.49 : 3,998.23 = 717.69 : x
2. Step 2: Convert to fraction form
   2,665.49/3,998.23 = 717.69/x
3. Step 3: Cross multiply
   2,665.49x = 3,998.23 × 717.69
4. Step 4: Simplify right side
   2,665.49x = 2,869,489.69
5. Step 5: Solve for x
   x = 2,869,489.69/2,665.49
6. Step 6: Final answer
   x = 1,076.53