Finding the Third Proportional to 4,909.50 and 10,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,909.50 : 10,639.50 = 10,639.50 : x
2. Step 2: Convert to fraction form
   4,909.50/10,639.50 = 10,639.50/x
3. Step 3: Cross multiply
   4,909.50x = 10,639.50 × 10,639.50
4. Step 4: Simplify right side
   4,909.50x = 113,198,960.25
5. Step 5: Solve for x
   x = 113,198,960.25/4,909.50
6. Step 6: Final answer
   x = 23,057.13