Finding the Third Proportional to 10,013,146 and 20,557,112

Step by Step Solution

1. Step 1: Write the proportion equation
   10,013,146 : 20,557,112 = 20,557,112 : x
2. Step 2: Convert to fraction form
   10,013,146/20,557,112 = 20,557,112/x
3. Step 3: Cross multiply
   10,013,146x = 20,557,112 × 20,557,112
4. Step 4: Simplify right side
   10,013,146x = 422,594,853,780,544
5. Step 5: Solve for x
   x = 422,594,853,780,544/10,013,146
6. Step 6: Final answer
   x = 42,204,003.99