Finding the Fourth Proportional to 3,664.76, 5,057.37 and 1,986.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.76 : 5,057.37 = 1,986.18 : x
2. Step 2: Convert to fraction form
   3,664.76/5,057.37 = 1,986.18/x
3. Step 3: Cross multiply
   3,664.76x = 5,057.37 × 1,986.18
4. Step 4: Simplify right side
   3,664.76x = 10,044,847.15
5. Step 5: Solve for x
   x = 10,044,847.15/3,664.76
6. Step 6: Final answer
   x = 2,740.93