Finding the Fourth Proportional to 2,748.75, 4,123.74 and 1,105.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.75 : 4,123.74 = 1,105.40 : x
2. Step 2: Convert to fraction form
   2,748.75/4,123.74 = 1,105.40/x
3. Step 3: Cross multiply
   2,748.75x = 4,123.74 × 1,105.40
4. Step 4: Simplify right side
   2,748.75x = 4,558,361.58
5. Step 5: Solve for x
   x = 4,558,361.58/2,748.75
6. Step 6: Final answer
   x = 1,658.34