Finding the Fourth Proportional to 1,433.90, 1,979.15 and 936.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.90 : 1,979.15 = 936.56 : x
2. Step 2: Convert to fraction form
   1,433.90/1,979.15 = 936.56/x
3. Step 3: Cross multiply
   1,433.90x = 1,979.15 × 936.56
4. Step 4: Simplify right side
   1,433.90x = 1,853,578.15
5. Step 5: Solve for x
   x = 1,853,578.15/1,433.90
6. Step 6: Final answer
   x = 1,292.69