Finding the Fourth Proportional to 1,204.61, 1,662.42 and 680.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204.61 : 1,662.42 = 680.63 : x
2. Step 2: Convert to fraction form
   1,204.61/1,662.42 = 680.63/x
3. Step 3: Cross multiply
   1,204.61x = 1,662.42 × 680.63
4. Step 4: Simplify right side
   1,204.61x = 1,131,484.61
5. Step 5: Solve for x
   x = 1,131,484.61/1,204.61
6. Step 6: Final answer
   x = 939.30