Finding the Third Proportional to 10,860,342 and 21,446,556

Step by Step Solution

1. Step 1: Write the proportion equation
   10,860,342 : 21,446,556 = 21,446,556 : x
2. Step 2: Convert to fraction form
   10,860,342/21,446,556 = 21,446,556/x
3. Step 3: Cross multiply
   10,860,342x = 21,446,556 × 21,446,556
4. Step 4: Simplify right side
   10,860,342x = 459,954,764,261,136
5. Step 5: Solve for x
   x = 459,954,764,261,136/10,860,342
6. Step 6: Final answer
   x = 42,351,775.32