Finding the Third Proportional to 10,840,974 and 21,407,772

Step by Step Solution

1. Step 1: Write the proportion equation
   10,840,974 : 21,407,772 = 21,407,772 : x
2. Step 2: Convert to fraction form
   10,840,974/21,407,772 = 21,407,772/x
3. Step 3: Cross multiply
   10,840,974x = 21,407,772 × 21,407,772
4. Step 4: Simplify right side
   10,840,974x = 458,292,702,003,984
5. Step 5: Solve for x
   x = 458,292,702,003,984/10,840,974
6. Step 6: Final answer
   x = 42,274,126.11