Finding the Fourth Proportional to 1,105.61, 1,658.15 and 488.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.61 : 1,658.15 = 488.97 : x
2. Step 2: Convert to fraction form
   1,105.61/1,658.15 = 488.97/x
3. Step 3: Cross multiply
   1,105.61x = 1,658.15 × 488.97
4. Step 4: Simplify right side
   1,105.61x = 810,785.61
5. Step 5: Solve for x
   x = 810,785.61/1,105.61
6. Step 6: Final answer
   x = 733.34