Finding the Fourth Proportional to 6,123.57, 8,450.51 and 3,639.57

Step by Step Solution

1. Step 1: Write the proportion equation
   6,123.57 : 8,450.51 = 3,639.57 : x
2. Step 2: Convert to fraction form
   6,123.57/8,450.51 = 3,639.57/x
3. Step 3: Cross multiply
   6,123.57x = 8,450.51 × 3,639.57
4. Step 4: Simplify right side
   6,123.57x = 30,756,222.68
5. Step 5: Solve for x
   x = 30,756,222.68/6,123.57
6. Step 6: Final answer
   x = 5,022.60