Finding the Fourth Proportional to 2,644.28, 3,966.72 and 1,084.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.28 : 3,966.72 = 1,084.22 : x
2. Step 2: Convert to fraction form
   2,644.28/3,966.72 = 1,084.22/x
3. Step 3: Cross multiply
   2,644.28x = 3,966.72 × 1,084.22
4. Step 4: Simplify right side
   2,644.28x = 4,300,794.23
5. Step 5: Solve for x
   x = 4,300,794.23/2,644.28
6. Step 6: Final answer
   x = 1,626.45