Finding the Third Proportional to 9,415,488 and 19,960,910

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415,488 : 19,960,910 = 19,960,910 : x
2. Step 2: Convert to fraction form
   9,415,488/19,960,910 = 19,960,910/x
3. Step 3: Cross multiply
   9,415,488x = 19,960,910 × 19,960,910
4. Step 4: Simplify right side
   9,415,488x = 398,437,928,028,100
5. Step 5: Solve for x
   x = 398,437,928,028,100/9,415,488
6. Step 6: Final answer
   x = 42,317,289.13