Finding the Fourth Proportional to 3,868.38, 5,809.72 and 2,020.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,868.38 : 5,809.72 = 2,020.76 : x
2. Step 2: Convert to fraction form
   3,868.38/5,809.72 = 2,020.76/x
3. Step 3: Cross multiply
   3,868.38x = 5,809.72 × 2,020.76
4. Step 4: Simplify right side
   3,868.38x = 11,740,049.79
5. Step 5: Solve for x
   x = 11,740,049.79/3,868.38
6. Step 6: Final answer
   x = 3,034.88