Finding the Third Proportional to 4,231,780 and 9,987,986

Step by Step Solution

1. Step 1: Write the proportion equation
   4,231,780 : 9,987,986 = 9,987,986 : x
2. Step 2: Convert to fraction form
   4,231,780/9,987,986 = 9,987,986/x
3. Step 3: Cross multiply
   4,231,780x = 9,987,986 × 9,987,986
4. Step 4: Simplify right side
   4,231,780x = 99,759,864,336,196
5. Step 5: Solve for x
   x = 99,759,864,336,196/4,231,780
6. Step 6: Final answer
   x = 23,573,972.26