Finding the Fourth Proportional to 2,639.70, 3,958.22 and 884.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.70 : 3,958.22 = 884.10 : x
2. Step 2: Convert to fraction form
   2,639.70/3,958.22 = 884.10/x
3. Step 3: Cross multiply
   2,639.70x = 3,958.22 × 884.10
4. Step 4: Simplify right side
   2,639.70x = 3,499,462.30
5. Step 5: Solve for x
   x = 3,499,462.30/2,639.70
6. Step 6: Final answer
   x = 1,325.70