Finding the Fourth Proportional to 2,641.38, 3,959.91 and 996.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.38 : 3,959.91 = 996.99 : x
2. Step 2: Convert to fraction form
   2,641.38/3,959.91 = 996.99/x
3. Step 3: Cross multiply
   2,641.38x = 3,959.91 × 996.99
4. Step 4: Simplify right side
   2,641.38x = 3,947,990.67
5. Step 5: Solve for x
   x = 3,947,990.67/2,641.38
6. Step 6: Final answer
   x = 1,494.67