Finding the Third Proportional to 12,930 and 19,771

Step by Step Solution

1. Step 1: Write the proportion equation
   12,930 : 19,771 = 19,771 : x
2. Step 2: Convert to fraction form
   12,930/19,771 = 19,771/x
3. Step 3: Cross multiply
   12,930x = 19,771 × 19,771
4. Step 4: Simplify right side
   12,930x = 390,892,441
5. Step 5: Solve for x
   x = 390,892,441/12,930
6. Step 6: Final answer
   x = 30,231.43