Finding the Third Proportional to 9,172,867 and 19,959,874

Step by Step Solution

1. Step 1: Write the proportion equation
   9,172,867 : 19,959,874 = 19,959,874 : x
2. Step 2: Convert to fraction form
   9,172,867/19,959,874 = 19,959,874/x
3. Step 3: Cross multiply
   9,172,867x = 19,959,874 × 19,959,874
4. Step 4: Simplify right side
   9,172,867x = 398,396,570,095,876
5. Step 5: Solve for x
   x = 398,396,570,095,876/9,172,867
6. Step 6: Final answer
   x = 43,432,066.56