Finding the Third Proportional to 9,155,318 and 12,800,496

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155,318 : 12,800,496 = 12,800,496 : x
2. Step 2: Convert to fraction form
   9,155,318/12,800,496 = 12,800,496/x
3. Step 3: Cross multiply
   9,155,318x = 12,800,496 × 12,800,496
4. Step 4: Simplify right side
   9,155,318x = 163,852,697,846,016
5. Step 5: Solve for x
   x = 163,852,697,846,016/9,155,318
6. Step 6: Final answer
   x = 17,896,996.90