Finding the Fourth Proportional to 1,085.33, 1,497.41 and 665.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.33 : 1,497.41 = 665.48 : x
2. Step 2: Convert to fraction form
   1,085.33/1,497.41 = 665.48/x
3. Step 3: Cross multiply
   1,085.33x = 1,497.41 × 665.48
4. Step 4: Simplify right side
   1,085.33x = 996,488.09
5. Step 5: Solve for x
   x = 996,488.09/1,085.33
6. Step 6: Final answer
   x = 918.14