Finding the Fourth Proportional to 1,227.22, 1,693.59 and 667.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.22 : 1,693.59 = 667.69 : x
2. Step 2: Convert to fraction form
   1,227.22/1,693.59 = 667.69/x
3. Step 3: Cross multiply
   1,227.22x = 1,693.59 × 667.69
4. Step 4: Simplify right side
   1,227.22x = 1,130,793.11
5. Step 5: Solve for x
   x = 1,130,793.11/1,227.22
6. Step 6: Final answer
   x = 921.43