Finding the Fourth Proportional to 2,665.71, 3,997.96 and 718.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.71 : 3,997.96 = 718.07 : x
2. Step 2: Convert to fraction form
   2,665.71/3,997.96 = 718.07/x
3. Step 3: Cross multiply
   2,665.71x = 3,997.96 × 718.07
4. Step 4: Simplify right side
   2,665.71x = 2,870,793.35
5. Step 5: Solve for x
   x = 2,870,793.35/2,665.71
6. Step 6: Final answer
   x = 1,076.93