Finding the Third Proportional to 3,936,642 and 6,428,134

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936,642 : 6,428,134 = 6,428,134 : x
2. Step 2: Convert to fraction form
   3,936,642/6,428,134 = 6,428,134/x
3. Step 3: Cross multiply
   3,936,642x = 6,428,134 × 6,428,134
4. Step 4: Simplify right side
   3,936,642x = 41,320,906,721,956
5. Step 5: Solve for x
   x = 41,320,906,721,956/3,936,642
6. Step 6: Final answer
   x = 10,496,485.77