Finding the Fourth Proportional to 1,016.43, 1,515.59 and 936.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.43 : 1,515.59 = 936.65 : x
2. Step 2: Convert to fraction form
   1,016.43/1,515.59 = 936.65/x
3. Step 3: Cross multiply
   1,016.43x = 1,515.59 × 936.65
4. Step 4: Simplify right side
   1,016.43x = 1,419,565.11
5. Step 5: Solve for x
   x = 1,419,565.11/1,016.43
6. Step 6: Final answer
   x = 1,396.62