Finding the Third Proportional to 6,428,648 and 13,389,832

Step by Step Solution

1. Step 1: Write the proportion equation
   6,428,648 : 13,389,832 = 13,389,832 : x
2. Step 2: Convert to fraction form
   6,428,648/13,389,832 = 13,389,832/x
3. Step 3: Cross multiply
   6,428,648x = 13,389,832 × 13,389,832
4. Step 4: Simplify right side
   6,428,648x = 179,287,600,988,224
5. Step 5: Solve for x
   x = 179,287,600,988,224/6,428,648
6. Step 6: Final answer
   x = 27,888,850.19