Finding the Fourth Proportional to 2,749.10, 4,123.55 and 1,105.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,749.10 : 4,123.55 = 1,105.20 : x
2. Step 2: Convert to fraction form
   2,749.10/4,123.55 = 1,105.20/x
3. Step 3: Cross multiply
   2,749.10x = 4,123.55 × 1,105.20
4. Step 4: Simplify right side
   2,749.10x = 4,557,347.46
5. Step 5: Solve for x
   x = 4,557,347.46/2,749.10
6. Step 6: Final answer
   x = 1,657.76