Finding the Fourth Proportional to 1,133.81, 1,564.61 and 667.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,133.81 : 1,564.61 = 667.97 : x
2. Step 2: Convert to fraction form
   1,133.81/1,564.61 = 667.97/x
3. Step 3: Cross multiply
   1,133.81x = 1,564.61 × 667.97
4. Step 4: Simplify right side
   1,133.81x = 1,045,109.20
5. Step 5: Solve for x
   x = 1,045,109.20/1,133.81
6. Step 6: Final answer
   x = 921.77