Finding the Third Proportional to 12,666 and 19,386

Step by Step Solution

1. Step 1: Write the proportion equation
   12,666 : 19,386 = 19,386 : x
2. Step 2: Convert to fraction form
   12,666/19,386 = 19,386/x
3. Step 3: Cross multiply
   12,666x = 19,386 × 19,386
4. Step 4: Simplify right side
   12,666x = 375,816,996
5. Step 5: Solve for x
   x = 375,816,996/12,666
6. Step 6: Final answer
   x = 29,671.32