Finding the Third Proportional to 3,213,686 and 4,406,673

Step by Step Solution

1. Step 1: Write the proportion equation
   3,213,686 : 4,406,673 = 4,406,673 : x
2. Step 2: Convert to fraction form
   3,213,686/4,406,673 = 4,406,673/x
3. Step 3: Cross multiply
   3,213,686x = 4,406,673 × 4,406,673
4. Step 4: Simplify right side
   3,213,686x = 19,418,766,928,929
5. Step 5: Solve for x
   x = 19,418,766,928,929/3,213,686
6. Step 6: Final answer
   x = 6,042,521.56