Finding the Fourth Proportional to 3,689.69, 5,529.85 and 3,650.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.69 : 5,529.85 = 3,650.63 : x
2. Step 2: Convert to fraction form
   3,689.69/5,529.85 = 3,650.63/x
3. Step 3: Cross multiply
   3,689.69x = 5,529.85 × 3,650.63
4. Step 4: Simplify right side
   3,689.69x = 20,187,399.53
5. Step 5: Solve for x
   x = 20,187,399.53/3,689.69
6. Step 6: Final answer
   x = 5,471.31