Finding the Fourth Proportional to 1,133.56, 1,564.26 and 667.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,133.56 : 1,564.26 = 667.72 : x
2. Step 2: Convert to fraction form
   1,133.56/1,564.26 = 667.72/x
3. Step 3: Cross multiply
   1,133.56x = 1,564.26 × 667.72
4. Step 4: Simplify right side
   1,133.56x = 1,044,487.69
5. Step 5: Solve for x
   x = 1,044,487.69/1,133.56
6. Step 6: Final answer
   x = 921.42