Finding the Third Proportional to 12,980 and 28,406

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980 : 28,406 = 28,406 : x
2. Step 2: Convert to fraction form
   12,980/28,406 = 28,406/x
3. Step 3: Cross multiply
   12,980x = 28,406 × 28,406
4. Step 4: Simplify right side
   12,980x = 806,900,836
5. Step 5: Solve for x
   x = 806,900,836/12,980
6. Step 6: Final answer
   x = 62,164.93