Finding the Fourth Proportional to 1,123.31, 1,549.49 and 874.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.31 : 1,549.49 = 874.23 : x
2. Step 2: Convert to fraction form
   1,123.31/1,549.49 = 874.23/x
3. Step 3: Cross multiply
   1,123.31x = 1,549.49 × 874.23
4. Step 4: Simplify right side
   1,123.31x = 1,354,610.64
5. Step 5: Solve for x
   x = 1,354,610.64/1,123.31
6. Step 6: Final answer
   x = 1,205.92