Finding the Fourth Proportional to 2,665.12, 3,997.12 and 717.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.12 : 3,997.12 = 717.34 : x
2. Step 2: Convert to fraction form
   2,665.12/3,997.12 = 717.34/x
3. Step 3: Cross multiply
   2,665.12x = 3,997.12 × 717.34
4. Step 4: Simplify right side
   2,665.12x = 2,867,294.06
5. Step 5: Solve for x
   x = 2,867,294.06/2,665.12
6. Step 6: Final answer
   x = 1,075.86