Finding the Fourth Proportional to 2,665.58, 3,997.91 and 717.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.58 : 3,997.91 = 717.32 : x
2. Step 2: Convert to fraction form
   2,665.58/3,997.91 = 717.32/x
3. Step 3: Cross multiply
   2,665.58x = 3,997.91 × 717.32
4. Step 4: Simplify right side
   2,665.58x = 2,867,792.59
5. Step 5: Solve for x
   x = 2,867,792.59/2,665.58
6. Step 6: Final answer
   x = 1,075.86