Finding the Fourth Proportional to 2,639.69, 3,958.22 and 884.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.69 : 3,958.22 = 884.09 : x
2. Step 2: Convert to fraction form
   2,639.69/3,958.22 = 884.09/x
3. Step 3: Cross multiply
   2,639.69x = 3,958.22 × 884.09
4. Step 4: Simplify right side
   2,639.69x = 3,499,418.30
5. Step 5: Solve for x
   x = 3,499,418.30/2,639.69
6. Step 6: Final answer
   x = 1,325.69