Finding the Fourth Proportional to 1,869.49, 2,579.25 and 1,123.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,869.49 : 2,579.25 = 1,123.69 : x
2. Step 2: Convert to fraction form
   1,869.49/2,579.25 = 1,123.69/x
3. Step 3: Cross multiply
   1,869.49x = 2,579.25 × 1,123.69
4. Step 4: Simplify right side
   1,869.49x = 2,898,277.43
5. Step 5: Solve for x
   x = 2,898,277.43/1,869.49
6. Step 6: Final answer
   x = 1,550.30