Finding the Fourth Proportional to 4,086.89, 5,639.96 and 2,318.49

Step by Step Solution

1. Step 1: Write the proportion equation
   4,086.89 : 5,639.96 = 2,318.49 : x
2. Step 2: Convert to fraction form
   4,086.89/5,639.96 = 2,318.49/x
3. Step 3: Cross multiply
   4,086.89x = 5,639.96 × 2,318.49
4. Step 4: Simplify right side
   4,086.89x = 13,076,190.86
5. Step 5: Solve for x
   x = 13,076,190.86/4,086.89
6. Step 6: Final answer
   x = 3,199.55