Finding the Third Proportional to 9,415,554 and 19,960,998

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415,554 : 19,960,998 = 19,960,998 : x
2. Step 2: Convert to fraction form
   9,415,554/19,960,998 = 19,960,998/x
3. Step 3: Cross multiply
   9,415,554x = 19,960,998 × 19,960,998
4. Step 4: Simplify right side
   9,415,554x = 398,441,441,156,004
5. Step 5: Solve for x
   x = 398,441,441,156,004/9,415,554
6. Step 6: Final answer
   x = 42,317,365.62