Finding the Fourth Proportional to 1,227.35, 1,693.75 and 667.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.35 : 1,693.75 = 667.82 : x
2. Step 2: Convert to fraction form
   1,227.35/1,693.75 = 667.82/x
3. Step 3: Cross multiply
   1,227.35x = 1,693.75 × 667.82
4. Step 4: Simplify right side
   1,227.35x = 1,131,119.10
5. Step 5: Solve for x
   x = 1,131,119.10/1,227.35
6. Step 6: Final answer
   x = 921.60