Finding the Fourth Proportional to 2,643.83, 3,965.91 and 888.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.83 : 3,965.91 = 888.69 : x
2. Step 2: Convert to fraction form
   2,643.83/3,965.91 = 888.69/x
3. Step 3: Cross multiply
   2,643.83x = 3,965.91 × 888.69
4. Step 4: Simplify right side
   2,643.83x = 3,524,460.11
5. Step 5: Solve for x
   x = 3,524,460.11/2,643.83
6. Step 6: Final answer
   x = 1,333.09