Finding the Third Proportional to 3,947,112 and 8,503,290

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947,112 : 8,503,290 = 8,503,290 : x
2. Step 2: Convert to fraction form
   3,947,112/8,503,290 = 8,503,290/x
3. Step 3: Cross multiply
   3,947,112x = 8,503,290 × 8,503,290
4. Step 4: Simplify right side
   3,947,112x = 72,305,940,824,100
5. Step 5: Solve for x
   x = 72,305,940,824,100/3,947,112
6. Step 6: Final answer
   x = 18,318,694.99