Finding the Third Proportional to 9,686,990 and 21,076,425

Step by Step Solution

1. Step 1: Write the proportion equation
   9,686,990 : 21,076,425 = 21,076,425 : x
2. Step 2: Convert to fraction form
   9,686,990/21,076,425 = 21,076,425/x
3. Step 3: Cross multiply
   9,686,990x = 21,076,425 × 21,076,425
4. Step 4: Simplify right side
   9,686,990x = 444,215,690,780,625
5. Step 5: Solve for x
   x = 444,215,690,780,625/9,686,990
6. Step 6: Final answer
   x = 45,856,937.07