Finding the Fourth Proportional to 2,019.83, 3,029.92 and 721.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.83 : 3,029.92 = 721.31 : x
2. Step 2: Convert to fraction form
   2,019.83/3,029.92 = 721.31/x
3. Step 3: Cross multiply
   2,019.83x = 3,029.92 × 721.31
4. Step 4: Simplify right side
   2,019.83x = 2,185,494.64
5. Step 5: Solve for x
   x = 2,185,494.64/2,019.83
6. Step 6: Final answer
   x = 1,082.02