Finding the Fourth Proportional to 1,204.50, 1,662.35 and 680.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204.50 : 1,662.35 = 680.57 : x
2. Step 2: Convert to fraction form
   1,204.50/1,662.35 = 680.57/x
3. Step 3: Cross multiply
   1,204.50x = 1,662.35 × 680.57
4. Step 4: Simplify right side
   1,204.50x = 1,131,333.82
5. Step 5: Solve for x
   x = 1,131,333.82/1,204.50
6. Step 6: Final answer
   x = 939.26