Finding the Third Proportional to 3,831,138 and 8,243,469

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831,138 : 8,243,469 = 8,243,469 : x
2. Step 2: Convert to fraction form
   3,831,138/8,243,469 = 8,243,469/x
3. Step 3: Cross multiply
   3,831,138x = 8,243,469 × 8,243,469
4. Step 4: Simplify right side
   3,831,138x = 67,954,781,153,961
5. Step 5: Solve for x
   x = 67,954,781,153,961/3,831,138
6. Step 6: Final answer
   x = 17,737,492.40