Finding the Fourth Proportional to 3,658.59, 5,047.61 and 2,086.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,658.59 : 5,047.61 = 2,086.29 : x
2. Step 2: Convert to fraction form
   3,658.59/5,047.61 = 2,086.29/x
3. Step 3: Cross multiply
   3,658.59x = 5,047.61 × 2,086.29
4. Step 4: Simplify right side
   3,658.59x = 10,530,767.84
5. Step 5: Solve for x
   x = 10,530,767.84/3,658.59
6. Step 6: Final answer
   x = 2,878.37