Finding the Third Proportional to 10,013,148 and 20,557,128

Step by Step Solution

1. Step 1: Write the proportion equation
   10,013,148 : 20,557,128 = 20,557,128 : x
2. Step 2: Convert to fraction form
   10,013,148/20,557,128 = 20,557,128/x
3. Step 3: Cross multiply
   10,013,148x = 20,557,128 × 20,557,128
4. Step 4: Simplify right side
   10,013,148x = 422,595,511,608,384
5. Step 5: Solve for x
   x = 422,595,511,608,384/10,013,148
6. Step 6: Final answer
   x = 42,204,061.26