Finding the Fourth Proportional to 2,643.04, 3,963.91 and 888.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.04 : 3,963.91 = 888.10 : x
2. Step 2: Convert to fraction form
   2,643.04/3,963.91 = 888.10/x
3. Step 3: Cross multiply
   2,643.04x = 3,963.91 × 888.10
4. Step 4: Simplify right side
   2,643.04x = 3,520,348.47
5. Step 5: Solve for x
   x = 3,520,348.47/2,643.04
6. Step 6: Final answer
   x = 1,331.93