Finding the Fourth Proportional to 2,728.56, 4,085.48 and 1,427.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.56 : 4,085.48 = 1,427.28 : x
2. Step 2: Convert to fraction form
   2,728.56/4,085.48 = 1,427.28/x
3. Step 3: Cross multiply
   2,728.56x = 4,085.48 × 1,427.28
4. Step 4: Simplify right side
   2,728.56x = 5,831,123.89
5. Step 5: Solve for x
   x = 5,831,123.89/2,728.56
6. Step 6: Final answer
   x = 2,137.07