Finding the Fourth Proportional to 3,664.67, 5,057.30 and 1,986.13

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.67 : 5,057.30 = 1,986.13 : x
2. Step 2: Convert to fraction form
   3,664.67/5,057.30 = 1,986.13/x
3. Step 3: Cross multiply
   3,664.67x = 5,057.30 × 1,986.13
4. Step 4: Simplify right side
   3,664.67x = 10,044,452.31
5. Step 5: Solve for x
   x = 10,044,452.31/3,664.67
6. Step 6: Final answer
   x = 2,740.89