Finding the Third Proportional to 8,480.81 and 12,217.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,480.81 : 12,217.50 = 12,217.50 : x
2. Step 2: Convert to fraction form
   8,480.81/12,217.50 = 12,217.50/x
3. Step 3: Cross multiply
   8,480.81x = 12,217.50 × 12,217.50
4. Step 4: Simplify right side
   8,480.81x = 149,267,306.25
5. Step 5: Solve for x
   x = 149,267,306.25/8,480.81
6. Step 6: Final answer
   x = 17,600.59