Finding the Fourth Proportional to 2,638.28, 3,643.37 and 1,644

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.28 : 3,643.37 = 1,644 : x
2. Step 2: Convert to fraction form
   2,638.28/3,643.37 = 1,644/x
3. Step 3: Cross multiply
   2,638.28x = 3,643.37 × 1,644
4. Step 4: Simplify right side
   2,638.28x = 5,989,692.06
5. Step 5: Solve for x
   x = 5,989,692.06/2,638.28
6. Step 6: Final answer
   x = 2,270.31