Finding the Fourth Proportional to 1,162.27, 1,603.54 and 664.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.27 : 1,603.54 = 664.56 : x
2. Step 2: Convert to fraction form
   1,162.27/1,603.54 = 664.56/x
3. Step 3: Cross multiply
   1,162.27x = 1,603.54 × 664.56
4. Step 4: Simplify right side
   1,162.27x = 1,065,648.44
5. Step 5: Solve for x
   x = 1,065,648.44/1,162.27
6. Step 6: Final answer
   x = 916.87