Finding the Fourth Proportional to 3,664.88, 5,057.60 and 1,986.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.88 : 5,057.60 = 1,986.32 : x
2. Step 2: Convert to fraction form
   3,664.88/5,057.60 = 1,986.32/x
3. Step 3: Cross multiply
   3,664.88x = 5,057.60 × 1,986.32
4. Step 4: Simplify right side
   3,664.88x = 10,046,012.03
5. Step 5: Solve for x
   x = 10,046,012.03/3,664.88
6. Step 6: Final answer
   x = 2,741.16