Finding the Fourth Proportional to 1,433.87, 1,978.15 and 936.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.87 : 1,978.15 = 936.33 : x
2. Step 2: Convert to fraction form
   1,433.87/1,978.15 = 936.33/x
3. Step 3: Cross multiply
   1,433.87x = 1,978.15 × 936.33
4. Step 4: Simplify right side
   1,433.87x = 1,852,201.19
5. Step 5: Solve for x
   x = 1,852,201.19/1,433.87
6. Step 6: Final answer
   x = 1,291.75