Finding the Fourth Proportional to 1,162.22, 1,603.67 and 664.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.22 : 1,603.67 = 664.81 : x
2. Step 2: Convert to fraction form
   1,162.22/1,603.67 = 664.81/x
3. Step 3: Cross multiply
   1,162.22x = 1,603.67 × 664.81
4. Step 4: Simplify right side
   1,162.22x = 1,066,128.52
5. Step 5: Solve for x
   x = 1,066,128.52/1,162.22
6. Step 6: Final answer
   x = 917.32