Finding the Third Proportional to 12,861,792 and 19,906,236

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861,792 : 19,906,236 = 19,906,236 : x
2. Step 2: Convert to fraction form
   12,861,792/19,906,236 = 19,906,236/x
3. Step 3: Cross multiply
   12,861,792x = 19,906,236 × 19,906,236
4. Step 4: Simplify right side
   12,861,792x = 396,258,231,687,696
5. Step 5: Solve for x
   x = 396,258,231,687,696/12,861,792
6. Step 6: Final answer
   x = 30,808,944.17