Finding the Fourth Proportional to 1,133.05, 1,563.61 and 661.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,133.05 : 1,563.61 = 661.27 : x
2. Step 2: Convert to fraction form
   1,133.05/1,563.61 = 661.27/x
3. Step 3: Cross multiply
   1,133.05x = 1,563.61 × 661.27
4. Step 4: Simplify right side
   1,133.05x = 1,033,968.38
5. Step 5: Solve for x
   x = 1,033,968.38/1,133.05
6. Step 6: Final answer
   x = 912.55