Finding the Third Proportional to 8,622 and 12,451.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,622 : 12,451.50 = 12,451.50 : x
2. Step 2: Convert to fraction form
   8,622/12,451.50 = 12,451.50/x
3. Step 3: Cross multiply
   8,622x = 12,451.50 × 12,451.50
4. Step 4: Simplify right side
   8,622x = 155,039,852.25
5. Step 5: Solve for x
   x = 155,039,852.25/8,622
6. Step 6: Final answer
   x = 17,981.89