Finding the Fourth Proportional to 1,868.63, 2,578.71 and 1,123.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.63 : 2,578.71 = 1,123.23 : x
2. Step 2: Convert to fraction form
   1,868.63/2,578.71 = 1,123.23/x
3. Step 3: Cross multiply
   1,868.63x = 2,578.71 × 1,123.23
4. Step 4: Simplify right side
   1,868.63x = 2,896,484.43
5. Step 5: Solve for x
   x = 2,896,484.43/1,868.63
6. Step 6: Final answer
   x = 1,550.06