Finding the Third Proportional to 4,430,642 and 6,638,593

Step by Step Solution

1. Step 1: Write the proportion equation
   4,430,642 : 6,638,593 = 6,638,593 : x
2. Step 2: Convert to fraction form
   4,430,642/6,638,593 = 6,638,593/x
3. Step 3: Cross multiply
   4,430,642x = 6,638,593 × 6,638,593
4. Step 4: Simplify right side
   4,430,642x = 44,070,917,019,649
5. Step 5: Solve for x
   x = 44,070,917,019,649/4,430,642
6. Step 6: Final answer
   x = 9,946,846.76