Finding the Third Proportional to 21,397,938 and 41,724,180

Step by Step Solution

1. Step 1: Write the proportion equation
   21,397,938 : 41,724,180 = 41,724,180 : x
2. Step 2: Convert to fraction form
   21,397,938/41,724,180 = 41,724,180/x
3. Step 3: Cross multiply
   21,397,938x = 41,724,180 × 41,724,180
4. Step 4: Simplify right side
   21,397,938x = 1,740,907,196,672,400
5. Step 5: Solve for x
   x = 1,740,907,196,672,400/21,397,938
6. Step 6: Final answer
   x = 81,358,642.91