Finding the Fourth Proportional to 2,728.87, 3,765.72 and 1,550.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.87 : 3,765.72 = 1,550.05 : x
2. Step 2: Convert to fraction form
   2,728.87/3,765.72 = 1,550.05/x
3. Step 3: Cross multiply
   2,728.87x = 3,765.72 × 1,550.05
4. Step 4: Simplify right side
   2,728.87x = 5,837,050.68
5. Step 5: Solve for x
   x = 5,837,050.68/2,728.87
6. Step 6: Final answer
   x = 2,139.00