Finding the Third Proportional to 3,914,728 and 8,624,156

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914,728 : 8,624,156 = 8,624,156 : x
2. Step 2: Convert to fraction form
   3,914,728/8,624,156 = 8,624,156/x
3. Step 3: Cross multiply
   3,914,728x = 8,624,156 × 8,624,156
4. Step 4: Simplify right side
   3,914,728x = 74,376,066,712,336
5. Step 5: Solve for x
   x = 74,376,066,712,336/3,914,728
6. Step 6: Final answer
   x = 18,999,038.17