Finding the Fourth Proportional to 2,055.20, 2,836.16 and 1,123.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.20 : 2,836.16 = 1,123.70 : x
2. Step 2: Convert to fraction form
   2,055.20/2,836.16 = 1,123.70/x
3. Step 3: Cross multiply
   2,055.20x = 2,836.16 × 1,123.70
4. Step 4: Simplify right side
   2,055.20x = 3,186,973.19
5. Step 5: Solve for x
   x = 3,186,973.19/2,055.20
6. Step 6: Final answer
   x = 1,550.69