Finding the Fourth Proportional to 2,728.64, 3,765.55 and 1,549.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.64 : 3,765.55 = 1,549.72 : x
2. Step 2: Convert to fraction form
   2,728.64/3,765.55 = 1,549.72/x
3. Step 3: Cross multiply
   2,728.64x = 3,765.55 × 1,549.72
4. Step 4: Simplify right side
   2,728.64x = 5,835,548.15
5. Step 5: Solve for x
   x = 5,835,548.15/2,728.64
6. Step 6: Final answer
   x = 2,138.63