Finding the Fourth Proportional to 1,227.16, 1,693.52 and 667.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.16 : 1,693.52 = 667.67 : x
2. Step 2: Convert to fraction form
   1,227.16/1,693.52 = 667.67/x
3. Step 3: Cross multiply
   1,227.16x = 1,693.52 × 667.67
4. Step 4: Simplify right side
   1,227.16x = 1,130,712.50
5. Step 5: Solve for x
   x = 1,130,712.50/1,227.16
6. Step 6: Final answer
   x = 921.41