Finding the Fourth Proportional to 3,687.89, 5,528.49 and 1,839.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,687.89 : 5,528.49 = 1,839.57 : x
2. Step 2: Convert to fraction form
   3,687.89/5,528.49 = 1,839.57/x
3. Step 3: Cross multiply
   3,687.89x = 5,528.49 × 1,839.57
4. Step 4: Simplify right side
   3,687.89x = 10,170,078.89
5. Step 5: Solve for x
   x = 10,170,078.89/3,687.89
6. Step 6: Final answer
   x = 2,757.69