Finding the Fourth Proportional to 2,638.17, 3,642.03 and 1,644.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.17 : 3,642.03 = 1,644.03 : x
2. Step 2: Convert to fraction form
   2,638.17/3,642.03 = 1,644.03/x
3. Step 3: Cross multiply
   2,638.17x = 3,642.03 × 1,644.03
4. Step 4: Simplify right side
   2,638.17x = 5,987,606.58
5. Step 5: Solve for x
   x = 5,987,606.58/2,638.17
6. Step 6: Final answer
   x = 2,269.61