Finding the Fourth Proportional to 1,078.73, 1,488.24 and 658.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.73 : 1,488.24 = 658.79 : x
2. Step 2: Convert to fraction form
   1,078.73/1,488.24 = 658.79/x
3. Step 3: Cross multiply
   1,078.73x = 1,488.24 × 658.79
4. Step 4: Simplify right side
   1,078.73x = 980,430.19
5. Step 5: Solve for x
   x = 980,430.19/1,078.73
6. Step 6: Final answer
   x = 908.88