Finding the Third Proportional to 26,257,992 and 42,189,561

Step by Step Solution

1. Step 1: Write the proportion equation
   26,257,992 : 42,189,561 = 42,189,561 : x
2. Step 2: Convert to fraction form
   26,257,992/42,189,561 = 42,189,561/x
3. Step 3: Cross multiply
   26,257,992x = 42,189,561 × 42,189,561
4. Step 4: Simplify right side
   26,257,992x = 1,779,959,057,372,721
5. Step 5: Solve for x
   x = 1,779,959,057,372,721/26,257,992
6. Step 6: Final answer
   x = 67,787,325.75