Finding the Third Proportional to 3,891,249 and 8,515,538

Step by Step Solution

1. Step 1: Write the proportion equation
   3,891,249 : 8,515,538 = 8,515,538 : x
2. Step 2: Convert to fraction form
   3,891,249/8,515,538 = 8,515,538/x
3. Step 3: Cross multiply
   3,891,249x = 8,515,538 × 8,515,538
4. Step 4: Simplify right side
   3,891,249x = 72,514,387,429,444
5. Step 5: Solve for x
   x = 72,514,387,429,444/3,891,249
6. Step 6: Final answer
   x = 18,635,247.30