Finding the Third Proportional to 10,138,608 and 21,115,926

Step by Step Solution

1. Step 1: Write the proportion equation
   10,138,608 : 21,115,926 = 21,115,926 : x
2. Step 2: Convert to fraction form
   10,138,608/21,115,926 = 21,115,926/x
3. Step 3: Cross multiply
   10,138,608x = 21,115,926 × 21,115,926
4. Step 4: Simplify right side
   10,138,608x = 445,882,330,837,476
5. Step 5: Solve for x
   x = 445,882,330,837,476/10,138,608
6. Step 6: Final answer
   x = 43,978,653.76