Finding the Fourth Proportional to 3,578.30, 4,938.40 and 2,086.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578.30 : 4,938.40 = 2,086.10 : x
2. Step 2: Convert to fraction form
   3,578.30/4,938.40 = 2,086.10/x
3. Step 3: Cross multiply
   3,578.30x = 4,938.40 × 2,086.10
4. Step 4: Simplify right side
   3,578.30x = 10,301,996.24
5. Step 5: Solve for x
   x = 10,301,996.24/3,578.30
6. Step 6: Final answer
   x = 2,879.02