Finding the Third Proportional to 3,947,136 and 8,503,338

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947,136 : 8,503,338 = 8,503,338 : x
2. Step 2: Convert to fraction form
   3,947,136/8,503,338 = 8,503,338/x
3. Step 3: Cross multiply
   3,947,136x = 8,503,338 × 8,503,338
4. Step 4: Simplify right side
   3,947,136x = 72,306,757,142,244
5. Step 5: Solve for x
   x = 72,306,757,142,244/3,947,136
6. Step 6: Final answer
   x = 18,318,790.42