Finding the Fourth Proportional to 1,227.72, 1,694.22 and 668.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.72 : 1,694.22 = 668.17 : x
2. Step 2: Convert to fraction form
   1,227.72/1,694.22 = 668.17/x
3. Step 3: Cross multiply
   1,227.72x = 1,694.22 × 668.17
4. Step 4: Simplify right side
   1,227.72x = 1,132,026.98
5. Step 5: Solve for x
   x = 1,132,026.98/1,227.72
6. Step 6: Final answer
   x = 922.06