Finding the Third Proportional to 9,955,405 and 21,275,498

Step by Step Solution

1. Step 1: Write the proportion equation
   9,955,405 : 21,275,498 = 21,275,498 : x
2. Step 2: Convert to fraction form
   9,955,405/21,275,498 = 21,275,498/x
3. Step 3: Cross multiply
   9,955,405x = 21,275,498 × 21,275,498
4. Step 4: Simplify right side
   9,955,405x = 452,646,815,148,004
5. Step 5: Solve for x
   x = 452,646,815,148,004/9,955,405
6. Step 6: Final answer
   x = 45,467,443.58