Finding the Third Proportional to 8,199,656 and 12,729,228

Step by Step Solution

1. Step 1: Write the proportion equation
   8,199,656 : 12,729,228 = 12,729,228 : x
2. Step 2: Convert to fraction form
   8,199,656/12,729,228 = 12,729,228/x
3. Step 3: Cross multiply
   8,199,656x = 12,729,228 × 12,729,228
4. Step 4: Simplify right side
   8,199,656x = 162,033,245,475,984
5. Step 5: Solve for x
   x = 162,033,245,475,984/8,199,656
6. Step 6: Final answer
   x = 19,760,980.88