Finding the Third Proportional to 9,919,364 and 21,029,256

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919,364 : 21,029,256 = 21,029,256 : x
2. Step 2: Convert to fraction form
   9,919,364/21,029,256 = 21,029,256/x
3. Step 3: Cross multiply
   9,919,364x = 21,029,256 × 21,029,256
4. Step 4: Simplify right side
   9,919,364x = 442,229,607,913,536
5. Step 5: Solve for x
   x = 442,229,607,913,536/9,919,364
6. Step 6: Final answer
   x = 44,582,455.88