Finding the Fourth Proportional to 1,162.46, 1,603.79 and 664.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.46 : 1,603.79 = 664.74 : x
2. Step 2: Convert to fraction form
   1,162.46/1,603.79 = 664.74/x
3. Step 3: Cross multiply
   1,162.46x = 1,603.79 × 664.74
4. Step 4: Simplify right side
   1,162.46x = 1,066,100.04
5. Step 5: Solve for x
   x = 1,066,100.04/1,162.46
6. Step 6: Final answer
   x = 917.11