Finding the Third Proportional to 5,387,980 and 8,365,302

Step by Step Solution

1. Step 1: Write the proportion equation
   5,387,980 : 8,365,302 = 8,365,302 : x
2. Step 2: Convert to fraction form
   5,387,980/8,365,302 = 8,365,302/x
3. Step 3: Cross multiply
   5,387,980x = 8,365,302 × 8,365,302
4. Step 4: Simplify right side
   5,387,980x = 69,978,277,551,204
5. Step 5: Solve for x
   x = 69,978,277,551,204/5,387,980
6. Step 6: Final answer
   x = 12,987,850.28