Finding the Fourth Proportional to 2,665.31, 3,998.16 and 717.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.31 : 3,998.16 = 717.53 : x
2. Step 2: Convert to fraction form
   2,665.31/3,998.16 = 717.53/x
3. Step 3: Cross multiply
   2,665.31x = 3,998.16 × 717.53
4. Step 4: Simplify right side
   2,665.31x = 2,868,779.75
5. Step 5: Solve for x
   x = 2,868,779.75/2,665.31
6. Step 6: Final answer
   x = 1,076.34