Finding the Fourth Proportional to 1,111.26, 1,667.49 and 495.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.26 : 1,667.49 = 495.42 : x
2. Step 2: Convert to fraction form
   1,111.26/1,667.49 = 495.42/x
3. Step 3: Cross multiply
   1,111.26x = 1,667.49 × 495.42
4. Step 4: Simplify right side
   1,111.26x = 826,107.90
5. Step 5: Solve for x
   x = 826,107.90/1,111.26
6. Step 6: Final answer
   x = 743.40