Finding the Fourth Proportional to 1,869.34, 2,579.59 and 1,123.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,869.34 : 2,579.59 = 1,123.15 : x
2. Step 2: Convert to fraction form
   1,869.34/2,579.59 = 1,123.15/x
3. Step 3: Cross multiply
   1,869.34x = 2,579.59 × 1,123.15
4. Step 4: Simplify right side
   1,869.34x = 2,897,266.51
5. Step 5: Solve for x
   x = 2,897,266.51/1,869.34
6. Step 6: Final answer
   x = 1,549.89