Finding the Third Proportional to 5,387,718 and 8,364,884

Step by Step Solution

1. Step 1: Write the proportion equation
   5,387,718 : 8,364,884 = 8,364,884 : x
2. Step 2: Convert to fraction form
   5,387,718/8,364,884 = 8,364,884/x
3. Step 3: Cross multiply
   5,387,718x = 8,364,884 × 8,364,884
4. Step 4: Simplify right side
   5,387,718x = 69,971,284,333,456
5. Step 5: Solve for x
   x = 69,971,284,333,456/5,387,718
6. Step 6: Final answer
   x = 12,987,183.88