Finding the Fourth Proportional to 1,105.60, 1,658.81 and 488.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.60 : 1,658.81 = 488.87 : x
2. Step 2: Convert to fraction form
   1,105.60/1,658.81 = 488.87/x
3. Step 3: Cross multiply
   1,105.60x = 1,658.81 × 488.87
4. Step 4: Simplify right side
   1,105.60x = 810,931.71
5. Step 5: Solve for x
   x = 810,931.71/1,105.60
6. Step 6: Final answer
   x = 733.48