Finding the Fourth Proportional to 2,642.16, 3,963.69 and 887.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.16 : 3,963.69 = 887.33 : x
2. Step 2: Convert to fraction form
   2,642.16/3,963.69 = 887.33/x
3. Step 3: Cross multiply
   2,642.16x = 3,963.69 × 887.33
4. Step 4: Simplify right side
   2,642.16x = 3,517,103.27
5. Step 5: Solve for x
   x = 3,517,103.27/2,642.16
6. Step 6: Final answer
   x = 1,331.15