Finding the Third Proportional to 9,151,236 and 19,720,864

Step by Step Solution

1. Step 1: Write the proportion equation
   9,151,236 : 19,720,864 = 19,720,864 : x
2. Step 2: Convert to fraction form
   9,151,236/19,720,864 = 19,720,864/x
3. Step 3: Cross multiply
   9,151,236x = 19,720,864 × 19,720,864
4. Step 4: Simplify right side
   9,151,236x = 388,912,476,906,496
5. Step 5: Solve for x
   x = 388,912,476,906,496/9,151,236
6. Step 6: Final answer
   x = 42,498,355.08