Finding the Fourth Proportional to 3,664.77, 5,057.34 and 1,986.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.77 : 5,057.34 = 1,986.18 : x
2. Step 2: Convert to fraction form
   3,664.77/5,057.34 = 1,986.18/x
3. Step 3: Cross multiply
   3,664.77x = 5,057.34 × 1,986.18
4. Step 4: Simplify right side
   3,664.77x = 10,044,787.56
5. Step 5: Solve for x
   x = 10,044,787.56/3,664.77
6. Step 6: Final answer
   x = 2,740.91