Finding the Fourth Proportional to 3,613.56, 4,986.82 and 2,020.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,613.56 : 4,986.82 = 2,020.15 : x
2. Step 2: Convert to fraction form
   3,613.56/4,986.82 = 2,020.15/x
3. Step 3: Cross multiply
   3,613.56x = 4,986.82 × 2,020.15
4. Step 4: Simplify right side
   3,613.56x = 10,074,124.42
5. Step 5: Solve for x
   x = 10,074,124.42/3,613.56
6. Step 6: Final answer
   x = 2,787.87