Finding the Third Proportional to 10,840,986 and 21,407,796

Step by Step Solution

1. Step 1: Write the proportion equation
   10,840,986 : 21,407,796 = 21,407,796 : x
2. Step 2: Convert to fraction form
   10,840,986/21,407,796 = 21,407,796/x
3. Step 3: Cross multiply
   10,840,986x = 21,407,796 × 21,407,796
4. Step 4: Simplify right side
   10,840,986x = 458,293,729,577,616
5. Step 5: Solve for x
   x = 458,293,729,577,616/10,840,986
6. Step 6: Final answer
   x = 42,274,174.10