Finding the Third Proportional to 12,966 and 19,830

Step by Step Solution

1. Step 1: Write the proportion equation
   12,966 : 19,830 = 19,830 : x
2. Step 2: Convert to fraction form
   12,966/19,830 = 19,830/x
3. Step 3: Cross multiply
   12,966x = 19,830 × 19,830
4. Step 4: Simplify right side
   12,966x = 393,228,900
5. Step 5: Solve for x
   x = 393,228,900/12,966
6. Step 6: Final answer
   x = 30,327.70