Finding the Third Proportional to 12,844,971 and 21,086,956

Step by Step Solution

1. Step 1: Write the proportion equation
   12,844,971 : 21,086,956 = 21,086,956 : x
2. Step 2: Convert to fraction form
   12,844,971/21,086,956 = 21,086,956/x
3. Step 3: Cross multiply
   12,844,971x = 21,086,956 × 21,086,956
4. Step 4: Simplify right side
   12,844,971x = 444,659,713,345,936
5. Step 5: Solve for x
   x = 444,659,713,345,936/12,844,971
6. Step 6: Final answer
   x = 34,617,416.68