Finding the Third Proportional to 9,510 and 12,621

Step by Step Solution

1. Step 1: Write the proportion equation
   9,510 : 12,621 = 12,621 : x
2. Step 2: Convert to fraction form
   9,510/12,621 = 12,621/x
3. Step 3: Cross multiply
   9,510x = 12,621 × 12,621
4. Step 4: Simplify right side
   9,510x = 159,289,641
5. Step 5: Solve for x
   x = 159,289,641/9,510
6. Step 6: Final answer
   x = 16,749.70