Finding the Third Proportional to 3,929,346 and 8,684,556

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929,346 : 8,684,556 = 8,684,556 : x
2. Step 2: Convert to fraction form
   3,929,346/8,684,556 = 8,684,556/x
3. Step 3: Cross multiply
   3,929,346x = 8,684,556 × 8,684,556
4. Step 4: Simplify right side
   3,929,346x = 75,421,512,917,136
5. Step 5: Solve for x
   x = 75,421,512,917,136/3,929,346
6. Step 6: Final answer
   x = 19,194,418.85