Finding the Fourth Proportional to 1,227.55, 1,693.98 and 668.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.55 : 1,693.98 = 668.01 : x
2. Step 2: Convert to fraction form
   1,227.55/1,693.98 = 668.01/x
3. Step 3: Cross multiply
   1,227.55x = 1,693.98 × 668.01
4. Step 4: Simplify right side
   1,227.55x = 1,131,595.58
5. Step 5: Solve for x
   x = 1,131,595.58/1,227.55
6. Step 6: Final answer
   x = 921.83