Finding the Fourth Proportional to 1,204.50, 1,662.12 and 680.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204.50 : 1,662.12 = 680.52 : x
2. Step 2: Convert to fraction form
   1,204.50/1,662.12 = 680.52/x
3. Step 3: Cross multiply
   1,204.50x = 1,662.12 × 680.52
4. Step 4: Simplify right side
   1,204.50x = 1,131,105.90
5. Step 5: Solve for x
   x = 1,131,105.90/1,204.50
6. Step 6: Final answer
   x = 939.07