Finding the Fourth Proportional to 2,021.72, 2,789.46 and 1,550.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.72 : 2,789.46 = 1,550.09 : x
2. Step 2: Convert to fraction form
   2,021.72/2,789.46 = 1,550.09/x
3. Step 3: Cross multiply
   2,021.72x = 2,789.46 × 1,550.09
4. Step 4: Simplify right side
   2,021.72x = 4,323,921.03
5. Step 5: Solve for x
   x = 4,323,921.03/2,021.72
6. Step 6: Final answer
   x = 2,138.74