Finding the Third Proportional to 9,825,840 and 21,144,672

Step by Step Solution

1. Step 1: Write the proportion equation
   9,825,840 : 21,144,672 = 21,144,672 : x
2. Step 2: Convert to fraction form
   9,825,840/21,144,672 = 21,144,672/x
3. Step 3: Cross multiply
   9,825,840x = 21,144,672 × 21,144,672
4. Step 4: Simplify right side
   9,825,840x = 447,097,153,987,584
5. Step 5: Solve for x
   x = 447,097,153,987,584/9,825,840
6. Step 6: Final answer
   x = 45,502,181.39