Finding the Third Proportional to 3,946,914 and 8,631,972

Step by Step Solution

1. Step 1: Write the proportion equation
   3,946,914 : 8,631,972 = 8,631,972 : x
2. Step 2: Convert to fraction form
   3,946,914/8,631,972 = 8,631,972/x
3. Step 3: Cross multiply
   3,946,914x = 8,631,972 × 8,631,972
4. Step 4: Simplify right side
   3,946,914x = 74,510,940,608,784
5. Step 5: Solve for x
   x = 74,510,940,608,784/3,946,914
6. Step 6: Final answer
   x = 18,878,278.22