Finding the Fourth Proportional to 2,019.99, 2,787.30 and 1,123.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.99 : 2,787.30 = 1,123.66 : x
2. Step 2: Convert to fraction form
   2,019.99/2,787.30 = 1,123.66/x
3. Step 3: Cross multiply
   2,019.99x = 2,787.30 × 1,123.66
4. Step 4: Simplify right side
   2,019.99x = 3,131,977.52
5. Step 5: Solve for x
   x = 3,131,977.52/2,019.99
6. Step 6: Final answer
   x = 1,550.49