Finding the Third Proportional to 3,946,920 and 8,631,984

Step by Step Solution

1. Step 1: Write the proportion equation
   3,946,920 : 8,631,984 = 8,631,984 : x
2. Step 2: Convert to fraction form
   3,946,920/8,631,984 = 8,631,984/x
3. Step 3: Cross multiply
   3,946,920x = 8,631,984 × 8,631,984
4. Step 4: Simplify right side
   3,946,920x = 74,511,147,776,256
5. Step 5: Solve for x
   x = 74,511,147,776,256/3,946,920
6. Step 6: Final answer
   x = 18,878,302.01