Finding the Third Proportional to 12,910 and 19,976

Step by Step Solution

1. Step 1: Write the proportion equation
   12,910 : 19,976 = 19,976 : x
2. Step 2: Convert to fraction form
   12,910/19,976 = 19,976/x
3. Step 3: Cross multiply
   12,910x = 19,976 × 19,976
4. Step 4: Simplify right side
   12,910x = 399,040,576
5. Step 5: Solve for x
   x = 399,040,576/12,910
6. Step 6: Final answer
   x = 30,909.42