Finding the Fourth Proportional to 3,658.50, 5,048.73 and 2,086.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,658.50 : 5,048.73 = 2,086.60 : x
2. Step 2: Convert to fraction form
   3,658.50/5,048.73 = 2,086.60/x
3. Step 3: Cross multiply
   3,658.50x = 5,048.73 × 2,086.60
4. Step 4: Simplify right side
   3,658.50x = 10,534,654.77
5. Step 5: Solve for x
   x = 10,534,654.77/3,658.50
6. Step 6: Final answer
   x = 2,879.50