Finding the Fourth Proportional to 2,665.82, 3,998.64 and 717.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.82 : 3,998.64 = 717.92 : x
2. Step 2: Convert to fraction form
   2,665.82/3,998.64 = 717.92/x
3. Step 3: Cross multiply
   2,665.82x = 3,998.64 × 717.92
4. Step 4: Simplify right side
   2,665.82x = 2,870,703.63
5. Step 5: Solve for x
   x = 2,870,703.63/2,665.82
6. Step 6: Final answer
   x = 1,076.86