Finding the Third Proportional to 8,958.50 and 10,578.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,958.50 : 10,578.50 = 10,578.50 : x
2. Step 2: Convert to fraction form
   8,958.50/10,578.50 = 10,578.50/x
3. Step 3: Cross multiply
   8,958.50x = 10,578.50 × 10,578.50
4. Step 4: Simplify right side
   8,958.50x = 111,904,662.25
5. Step 5: Solve for x
   x = 111,904,662.25/8,958.50
6. Step 6: Final answer
   x = 12,491.45