Finding the Third Proportional to 5,387,976 and 8,365,296

Step by Step Solution

1. Step 1: Write the proportion equation
   5,387,976 : 8,365,296 = 8,365,296 : x
2. Step 2: Convert to fraction form
   5,387,976/8,365,296 = 8,365,296/x
3. Step 3: Cross multiply
   5,387,976x = 8,365,296 × 8,365,296
4. Step 4: Simplify right side
   5,387,976x = 69,978,177,167,616
5. Step 5: Solve for x
   x = 69,978,177,167,616/5,387,976
6. Step 6: Final answer
   x = 12,987,841.29