Finding the Fourth Proportional to 2,641.94, 3,960.91 and 886.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.94 : 3,960.91 = 886.33 : x
2. Step 2: Convert to fraction form
   2,641.94/3,960.91 = 886.33/x
3. Step 3: Cross multiply
   2,641.94x = 3,960.91 × 886.33
4. Step 4: Simplify right side
   2,641.94x = 3,510,673.36
5. Step 5: Solve for x
   x = 3,510,673.36/2,641.94
6. Step 6: Final answer
   x = 1,328.82