Finding the Third Proportional to 4,709,385 and 10,171,638

Step by Step Solution

1. Step 1: Write the proportion equation
   4,709,385 : 10,171,638 = 10,171,638 : x
2. Step 2: Convert to fraction form
   4,709,385/10,171,638 = 10,171,638/x
3. Step 3: Cross multiply
   4,709,385x = 10,171,638 × 10,171,638
4. Step 4: Simplify right side
   4,709,385x = 103,462,219,603,044
5. Step 5: Solve for x
   x = 103,462,219,603,044/4,709,385
6. Step 6: Final answer
   x = 21,969,369.59