Finding the Fourth Proportional to 2,019.72, 3,028.28 and 850.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.72 : 3,028.28 = 850.48 : x
2. Step 2: Convert to fraction form
   2,019.72/3,028.28 = 850.48/x
3. Step 3: Cross multiply
   2,019.72x = 3,028.28 × 850.48
4. Step 4: Simplify right side
   2,019.72x = 2,575,491.57
5. Step 5: Solve for x
   x = 2,575,491.57/2,019.72
6. Step 6: Final answer
   x = 1,275.17