Finding the Third Proportional to 21,396,764 and 41,721,410

Step by Step Solution

1. Step 1: Write the proportion equation
   21,396,764 : 41,721,410 = 41,721,410 : x
2. Step 2: Convert to fraction form
   21,396,764/41,721,410 = 41,721,410/x
3. Step 3: Cross multiply
   21,396,764x = 41,721,410 × 41,721,410
4. Step 4: Simplify right side
   21,396,764x = 1,740,676,052,388,100
5. Step 5: Solve for x
   x = 1,740,676,052,388,100/21,396,764
6. Step 6: Final answer
   x = 81,352,304.13