Finding the Third Proportional to 10,013,149 and 20,557,120

Step by Step Solution

1. Step 1: Write the proportion equation
   10,013,149 : 20,557,120 = 20,557,120 : x
2. Step 2: Convert to fraction form
   10,013,149/20,557,120 = 20,557,120/x
3. Step 3: Cross multiply
   10,013,149x = 20,557,120 × 20,557,120
4. Step 4: Simplify right side
   10,013,149x = 422,595,182,694,400
5. Step 5: Solve for x
   x = 422,595,182,694,400/10,013,149
6. Step 6: Final answer
   x = 42,204,024.20