Finding the Third Proportional to 3,946,906 and 8,631,956

Step by Step Solution

1. Step 1: Write the proportion equation
   3,946,906 : 8,631,956 = 8,631,956 : x
2. Step 2: Convert to fraction form
   3,946,906/8,631,956 = 8,631,956/x
3. Step 3: Cross multiply
   3,946,906x = 8,631,956 × 8,631,956
4. Step 4: Simplify right side
   3,946,906x = 74,510,664,385,936
5. Step 5: Solve for x
   x = 74,510,664,385,936/3,946,906
6. Step 6: Final answer
   x = 18,878,246.50