Finding the Third Proportional to 3,946,908 and 8,631,960

Step by Step Solution

1. Step 1: Write the proportion equation
   3,946,908 : 8,631,960 = 8,631,960 : x
2. Step 2: Convert to fraction form
   3,946,908/8,631,960 = 8,631,960/x
3. Step 3: Cross multiply
   3,946,908x = 8,631,960 × 8,631,960
4. Step 4: Simplify right side
   3,946,908x = 74,510,733,441,600
5. Step 5: Solve for x
   x = 74,510,733,441,600/3,946,908
6. Step 6: Final answer
   x = 18,878,254.43