Finding the Fourth Proportional to 3,658.45, 5,048.61 and 2,086.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,658.45 : 5,048.61 = 2,086.57 : x
2. Step 2: Convert to fraction form
   3,658.45/5,048.61 = 2,086.57/x
3. Step 3: Cross multiply
   3,658.45x = 5,048.61 × 2,086.57
4. Step 4: Simplify right side
   3,658.45x = 10,534,278.17
5. Step 5: Solve for x
   x = 10,534,278.17/3,658.45
6. Step 6: Final answer
   x = 2,879.44