Finding the Fourth Proportional to 2,665.05, 3,997.26 and 717.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.05 : 3,997.26 = 717.10 : x
2. Step 2: Convert to fraction form
   2,665.05/3,997.26 = 717.10/x
3. Step 3: Cross multiply
   2,665.05x = 3,997.26 × 717.10
4. Step 4: Simplify right side
   2,665.05x = 2,866,415.16
5. Step 5: Solve for x
   x = 2,866,415.16/2,665.05
6. Step 6: Final answer
   x = 1,075.56