Finding the Fourth Proportional to 2,019.72, 2,787.12 and 1,123.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.72 : 2,787.12 = 1,123.44 : x
2. Step 2: Convert to fraction form
   2,019.72/2,787.12 = 1,123.44/x
3. Step 3: Cross multiply
   2,019.72x = 2,787.12 × 1,123.44
4. Step 4: Simplify right side
   2,019.72x = 3,131,162.09
5. Step 5: Solve for x
   x = 3,131,162.09/2,019.72
6. Step 6: Final answer
   x = 1,550.30