Finding the Third Proportional to 9,155,317 and 12,800,495

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155,317 : 12,800,495 = 12,800,495 : x
2. Step 2: Convert to fraction form
   9,155,317/12,800,495 = 12,800,495/x
3. Step 3: Cross multiply
   9,155,317x = 12,800,495 × 12,800,495
4. Step 4: Simplify right side
   9,155,317x = 163,852,672,245,025
5. Step 5: Solve for x
   x = 163,852,672,245,025/9,155,317
6. Step 6: Final answer
   x = 17,896,996.06