Finding the Fourth Proportional to 2,019.48, 3,028.59 and 720.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.48 : 3,028.59 = 720.69 : x
2. Step 2: Convert to fraction form
   2,019.48/3,028.59 = 720.69/x
3. Step 3: Cross multiply
   2,019.48x = 3,028.59 × 720.69
4. Step 4: Simplify right side
   2,019.48x = 2,182,674.53
5. Step 5: Solve for x
   x = 2,182,674.53/2,019.48
6. Step 6: Final answer
   x = 1,080.81