Finding the Fourth Proportional to 1,078.57, 1,488.39 and 606.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.57 : 1,488.39 = 606.45 : x
2. Step 2: Convert to fraction form
   1,078.57/1,488.39 = 606.45/x
3. Step 3: Cross multiply
   1,078.57x = 1,488.39 × 606.45
4. Step 4: Simplify right side
   1,078.57x = 902,641.97
5. Step 5: Solve for x
   x = 902,641.97/1,078.57
6. Step 6: Final answer
   x = 836.89