Finding the Fourth Proportional to 3,578.88, 4,937.49 and 2,086.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578.88 : 4,937.49 = 2,086.23 : x
2. Step 2: Convert to fraction form
   3,578.88/4,937.49 = 2,086.23/x
3. Step 3: Cross multiply
   3,578.88x = 4,937.49 × 2,086.23
4. Step 4: Simplify right side
   3,578.88x = 10,300,739.76
5. Step 5: Solve for x
   x = 10,300,739.76/3,578.88
6. Step 6: Final answer
   x = 2,878.20