Finding the Third Proportional to 4,207,272 and 9,215,412

Step by Step Solution

1. Step 1: Write the proportion equation
   4,207,272 : 9,215,412 = 9,215,412 : x
2. Step 2: Convert to fraction form
   4,207,272/9,215,412 = 9,215,412/x
3. Step 3: Cross multiply
   4,207,272x = 9,215,412 × 9,215,412
4. Step 4: Simplify right side
   4,207,272x = 84,923,818,329,744
5. Step 5: Solve for x
   x = 84,923,818,329,744/4,207,272
6. Step 6: Final answer
   x = 20,185,007.85