Finding the Fourth Proportional to 2,728.78, 3,765.72 and 1,550.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.78 : 3,765.72 = 1,550.23 : x
2. Step 2: Convert to fraction form
   2,728.78/3,765.72 = 1,550.23/x
3. Step 3: Cross multiply
   2,728.78x = 3,765.72 × 1,550.23
4. Step 4: Simplify right side
   2,728.78x = 5,837,732.12
5. Step 5: Solve for x
   x = 5,837,732.12/2,728.78
6. Step 6: Final answer
   x = 2,139.32