Finding the Third Proportional to 9,469,862 and 21,188,428

Step by Step Solution

1. Step 1: Write the proportion equation
   9,469,862 : 21,188,428 = 21,188,428 : x
2. Step 2: Convert to fraction form
   9,469,862/21,188,428 = 21,188,428/x
3. Step 3: Cross multiply
   9,469,862x = 21,188,428 × 21,188,428
4. Step 4: Simplify right side
   9,469,862x = 448,949,481,111,184
5. Step 5: Solve for x
   x = 448,949,481,111,184/9,469,862
6. Step 6: Final answer
   x = 47,408,239.01