Finding the Fourth Proportional to 1,078.45, 1,488.22 and 659.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.45 : 1,488.22 = 659.50 : x
2. Step 2: Convert to fraction form
   1,078.45/1,488.22 = 659.50/x
3. Step 3: Cross multiply
   1,078.45x = 1,488.22 × 659.50
4. Step 4: Simplify right side
   1,078.45x = 981,481.09
5. Step 5: Solve for x
   x = 981,481.09/1,078.45
6. Step 6: Final answer
   x = 910.08