Finding the Third Proportional to 12,510 and 19,809

Step by Step Solution

1. Step 1: Write the proportion equation
   12,510 : 19,809 = 19,809 : x
2. Step 2: Convert to fraction form
   12,510/19,809 = 19,809/x
3. Step 3: Cross multiply
   12,510x = 19,809 × 19,809
4. Step 4: Simplify right side
   12,510x = 392,396,481
5. Step 5: Solve for x
   x = 392,396,481/12,510
6. Step 6: Final answer
   x = 31,366.63