Finding the Fourth Proportional to 2,728.64, 3,765.85 and 1,550.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.64 : 3,765.85 = 1,550.00 : x
2. Step 2: Convert to fraction form
   2,728.64/3,765.85 = 1,550.00/x
3. Step 3: Cross multiply
   2,728.64x = 3,765.85 × 1,550.00
4. Step 4: Simplify right side
   2,728.64x = 5,837,044.80
5. Step 5: Solve for x
   x = 5,837,044.80/2,728.64
6. Step 6: Final answer
   x = 2,139.18