Finding the Fourth Proportional to 1,227.50, 1,693.98 and 667.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.50 : 1,693.98 = 667.97 : x
2. Step 2: Convert to fraction form
   1,227.50/1,693.98 = 667.97/x
3. Step 3: Cross multiply
   1,227.50x = 1,693.98 × 667.97
4. Step 4: Simplify right side
   1,227.50x = 1,131,533.01
5. Step 5: Solve for x
   x = 1,131,533.01/1,227.50
6. Step 6: Final answer
   x = 921.82