Finding the Third Proportional to 21,396,766 and 41,721,414

Step by Step Solution

1. Step 1: Write the proportion equation
   21,396,766 : 41,721,414 = 41,721,414 : x
2. Step 2: Convert to fraction form
   21,396,766/41,721,414 = 41,721,414/x
3. Step 3: Cross multiply
   21,396,766x = 41,721,414 × 41,721,414
4. Step 4: Simplify right side
   21,396,766x = 1,740,676,386,159,396
5. Step 5: Solve for x
   x = 1,740,676,386,159,396/21,396,766
6. Step 6: Final answer
   x = 81,352,312.13