Finding the Third Proportional to 9,982,818 and 21,478,824

Step by Step Solution

1. Step 1: Write the proportion equation
   9,982,818 : 21,478,824 = 21,478,824 : x
2. Step 2: Convert to fraction form
   9,982,818/21,478,824 = 21,478,824/x
3. Step 3: Cross multiply
   9,982,818x = 21,478,824 × 21,478,824
4. Step 4: Simplify right side
   9,982,818x = 461,339,880,422,976
5. Step 5: Solve for x
   x = 461,339,880,422,976/9,982,818
6. Step 6: Final answer
   x = 46,213,391.89