Finding the Third Proportional to 11,821,990 and 25,467,686

Step by Step Solution

1. Step 1: Write the proportion equation
   11,821,990 : 25,467,686 = 25,467,686 : x
2. Step 2: Convert to fraction form
   11,821,990/25,467,686 = 25,467,686/x
3. Step 3: Cross multiply
   11,821,990x = 25,467,686 × 25,467,686
4. Step 4: Simplify right side
   11,821,990x = 648,603,030,194,596
5. Step 5: Solve for x
   x = 648,603,030,194,596/11,821,990
6. Step 6: Final answer
   x = 54,864,115.96