Finding the Fourth Proportional to 2,012.44, 3,019.52 and 842.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.44 : 3,019.52 = 842.72 : x
2. Step 2: Convert to fraction form
   2,012.44/3,019.52 = 842.72/x
3. Step 3: Cross multiply
   2,012.44x = 3,019.52 × 842.72
4. Step 4: Simplify right side
   2,012.44x = 2,544,594.80
5. Step 5: Solve for x
   x = 2,544,594.80/2,012.44
6. Step 6: Final answer
   x = 1,264.43