Finding the Third Proportional to 10,111,421 and 21,640,018

Step by Step Solution

1. Step 1: Write the proportion equation
   10,111,421 : 21,640,018 = 21,640,018 : x
2. Step 2: Convert to fraction form
   10,111,421/21,640,018 = 21,640,018/x
3. Step 3: Cross multiply
   10,111,421x = 21,640,018 × 21,640,018
4. Step 4: Simplify right side
   10,111,421x = 468,290,379,040,324
5. Step 5: Solve for x
   x = 468,290,379,040,324/10,111,421
6. Step 6: Final answer
   x = 46,313,013.67