Finding the Fourth Proportional to 2,020.38, 3,030.74 and 539.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.38 : 3,030.74 = 539.83 : x
2. Step 2: Convert to fraction form
   2,020.38/3,030.74 = 539.83/x
3. Step 3: Cross multiply
   2,020.38x = 3,030.74 × 539.83
4. Step 4: Simplify right side
   2,020.38x = 1,636,076.22
5. Step 5: Solve for x
   x = 1,636,076.22/2,020.38
6. Step 6: Final answer
   x = 809.79