Finding the Third Proportional to 21,397,932 and 41,724,168

Step by Step Solution

1. Step 1: Write the proportion equation
   21,397,932 : 41,724,168 = 41,724,168 : x
2. Step 2: Convert to fraction form
   21,397,932/41,724,168 = 41,724,168/x
3. Step 3: Cross multiply
   21,397,932x = 41,724,168 × 41,724,168
4. Step 4: Simplify right side
   21,397,932x = 1,740,906,195,292,224
5. Step 5: Solve for x
   x = 1,740,906,195,292,224/21,397,932
6. Step 6: Final answer
   x = 81,358,618.92