Finding the Fourth Proportional to 1,162.38, 1,603.96 and 664.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.38 : 1,603.96 = 664.93 : x
2. Step 2: Convert to fraction form
   1,162.38/1,603.96 = 664.93/x
3. Step 3: Cross multiply
   1,162.38x = 1,603.96 × 664.93
4. Step 4: Simplify right side
   1,162.38x = 1,066,521.12
5. Step 5: Solve for x
   x = 1,066,521.12/1,162.38
6. Step 6: Final answer
   x = 917.53