Finding the Fourth Proportional to 1,162.41, 1,604.10 and 665.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.41 : 1,604.10 = 665.05 : x
2. Step 2: Convert to fraction form
   1,162.41/1,604.10 = 665.05/x
3. Step 3: Cross multiply
   1,162.41x = 1,604.10 × 665.05
4. Step 4: Simplify right side
   1,162.41x = 1,066,806.71
5. Step 5: Solve for x
   x = 1,066,806.71/1,162.41
6. Step 6: Final answer
   x = 917.75