Finding the Fourth Proportional to 1,162.72, 1,604.66 and 665.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.72 : 1,604.66 = 665.52 : x
2. Step 2: Convert to fraction form
   1,162.72/1,604.66 = 665.52/x
3. Step 3: Cross multiply
   1,162.72x = 1,604.66 × 665.52
4. Step 4: Simplify right side
   1,162.72x = 1,067,933.32
5. Step 5: Solve for x
   x = 1,067,933.32/1,162.72
6. Step 6: Final answer
   x = 918.48