Finding the Fourth Proportional to 2,639.82, 3,959.61 and 996.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.82 : 3,959.61 = 996.24 : x
2. Step 2: Convert to fraction form
   2,639.82/3,959.61 = 996.24/x
3. Step 3: Cross multiply
   2,639.82x = 3,959.61 × 996.24
4. Step 4: Simplify right side
   2,639.82x = 3,944,721.87
5. Step 5: Solve for x
   x = 3,944,721.87/2,639.82
6. Step 6: Final answer
   x = 1,494.31