Finding the Fourth Proportional to 3,578.67, 4,938.69 and 2,086.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578.67 : 4,938.69 = 2,086.34 : x
2. Step 2: Convert to fraction form
   3,578.67/4,938.69 = 2,086.34/x
3. Step 3: Cross multiply
   3,578.67x = 4,938.69 × 2,086.34
4. Step 4: Simplify right side
   3,578.67x = 10,303,761.80
5. Step 5: Solve for x
   x = 10,303,761.80/3,578.67
6. Step 6: Final answer
   x = 2,879.22