Finding the Fourth Proportional to 3,658.30, 5,048.31 and 2,086.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,658.30 : 5,048.31 = 2,086.09 : x
2. Step 2: Convert to fraction form
   3,658.30/5,048.31 = 2,086.09/x
3. Step 3: Cross multiply
   3,658.30x = 5,048.31 × 2,086.09
4. Step 4: Simplify right side
   3,658.30x = 10,531,229.01
5. Step 5: Solve for x
   x = 10,531,229.01/3,658.30
6. Step 6: Final answer
   x = 2,878.72