Finding the Fourth Proportional to 1,336.37, 2,003.33 and 989.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.37 : 2,003.33 = 989.28 : x
2. Step 2: Convert to fraction form
   1,336.37/2,003.33 = 989.28/x
3. Step 3: Cross multiply
   1,336.37x = 2,003.33 × 989.28
4. Step 4: Simplify right side
   1,336.37x = 1,981,856.78
5. Step 5: Solve for x
   x = 1,981,856.78/1,336.37
6. Step 6: Final answer
   x = 1,483.02