Finding the Fourth Proportional to 1,227.35, 1,693.76 and 667.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.35 : 1,693.76 = 667.83 : x
2. Step 2: Convert to fraction form
   1,227.35/1,693.76 = 667.83/x
3. Step 3: Cross multiply
   1,227.35x = 1,693.76 × 667.83
4. Step 4: Simplify right side
   1,227.35x = 1,131,140.40
5. Step 5: Solve for x
   x = 1,131,140.40/1,227.35
6. Step 6: Final answer
   x = 921.61