Finding the Fourth Proportional to 2,055.40, 2,836.42 and 1,123.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.40 : 2,836.42 = 1,123.90 : x
2. Step 2: Convert to fraction form
   2,055.40/2,836.42 = 1,123.90/x
3. Step 3: Cross multiply
   2,055.40x = 2,836.42 × 1,123.90
4. Step 4: Simplify right side
   2,055.40x = 3,187,852.44
5. Step 5: Solve for x
   x = 3,187,852.44/2,055.40
6. Step 6: Final answer
   x = 1,550.96