Finding the Third Proportional to 9,852,978 and 21,162,398

Step by Step Solution

1. Step 1: Write the proportion equation
   9,852,978 : 21,162,398 = 21,162,398 : x
2. Step 2: Convert to fraction form
   9,852,978/21,162,398 = 21,162,398/x
3. Step 3: Cross multiply
   9,852,978x = 21,162,398 × 21,162,398
4. Step 4: Simplify right side
   9,852,978x = 447,847,089,110,404
5. Step 5: Solve for x
   x = 447,847,089,110,404/9,852,978
6. Step 6: Final answer
   x = 45,452,967.53