Finding the Fourth Proportional to 1,162.59, 1,604.42 and 665.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.59 : 1,604.42 = 665.25 : x
2. Step 2: Convert to fraction form
   1,162.59/1,604.42 = 665.25/x
3. Step 3: Cross multiply
   1,162.59x = 1,604.42 × 665.25
4. Step 4: Simplify right side
   1,162.59x = 1,067,340.41
5. Step 5: Solve for x
   x = 1,067,340.41/1,162.59
6. Step 6: Final answer
   x = 918.07