Finding the Fourth Proportional to 2,639.84, 3,960.17 and 996.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.84 : 3,960.17 = 996.35 : x
2. Step 2: Convert to fraction form
   2,639.84/3,960.17 = 996.35/x
3. Step 3: Cross multiply
   2,639.84x = 3,960.17 × 996.35
4. Step 4: Simplify right side
   2,639.84x = 3,945,710.40
5. Step 5: Solve for x
   x = 3,945,710.40/2,639.84
6. Step 6: Final answer
   x = 1,494.68