Finding the Fourth Proportional to 1,433.22, 1,978.71 and 936.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.22 : 1,978.71 = 936.69 : x
2. Step 2: Convert to fraction form
   1,433.22/1,978.71 = 936.69/x
3. Step 3: Cross multiply
   1,433.22x = 1,978.71 × 936.69
4. Step 4: Simplify right side
   1,433.22x = 1,853,434.36
5. Step 5: Solve for x
   x = 1,853,434.36/1,433.22
6. Step 6: Final answer
   x = 1,293.20