Finding the Fourth Proportional to 1,227.94, 1,694.56 and 668.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.94 : 1,694.56 = 668.42 : x
2. Step 2: Convert to fraction form
   1,227.94/1,694.56 = 668.42/x
3. Step 3: Cross multiply
   1,227.94x = 1,694.56 × 668.42
4. Step 4: Simplify right side
   1,227.94x = 1,132,677.80
5. Step 5: Solve for x
   x = 1,132,677.80/1,227.94
6. Step 6: Final answer
   x = 922.42