Finding the Fourth Proportional to 2,639.84, 3,958.43 and 884.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.84 : 3,958.43 = 884.23 : x
2. Step 2: Convert to fraction form
   2,639.84/3,958.43 = 884.23/x
3. Step 3: Cross multiply
   2,639.84x = 3,958.43 × 884.23
4. Step 4: Simplify right side
   2,639.84x = 3,500,162.56
5. Step 5: Solve for x
   x = 3,500,162.56/2,639.84
6. Step 6: Final answer
   x = 1,325.90