Finding the Third Proportional to 10,840,994 and 21,407,811

Step by Step Solution

1. Step 1: Write the proportion equation
   10,840,994 : 21,407,811 = 21,407,811 : x
2. Step 2: Convert to fraction form
   10,840,994/21,407,811 = 21,407,811/x
3. Step 3: Cross multiply
   10,840,994x = 21,407,811 × 21,407,811
4. Step 4: Simplify right side
   10,840,994x = 458,294,371,811,721
5. Step 5: Solve for x
   x = 458,294,371,811,721/10,840,994
6. Step 6: Final answer
   x = 42,274,202.15