Finding the Fourth Proportional to 1,204.38, 1,662.12 and 680.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204.38 : 1,662.12 = 680.49 : x
2. Step 2: Convert to fraction form
   1,204.38/1,662.12 = 680.49/x
3. Step 3: Cross multiply
   1,204.38x = 1,662.12 × 680.49
4. Step 4: Simplify right side
   1,204.38x = 1,131,056.04
5. Step 5: Solve for x
   x = 1,131,056.04/1,204.38
6. Step 6: Final answer
   x = 939.12