Finding the Fourth Proportional to 2,744.73, 3,786.42 and 2,638.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,744.73 : 3,786.42 = 2,638.65 : x
2. Step 2: Convert to fraction form
   2,744.73/3,786.42 = 2,638.65/x
3. Step 3: Cross multiply
   2,744.73x = 3,786.42 × 2,638.65
4. Step 4: Simplify right side
   2,744.73x = 9,991,018.20
5. Step 5: Solve for x
   x = 9,991,018.20/2,744.73
6. Step 6: Final answer
   x = 3,640.07