Finding the Third Proportional to 3,947,131 and 8,503,322

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947,131 : 8,503,322 = 8,503,322 : x
2. Step 2: Convert to fraction form
   3,947,131/8,503,322 = 8,503,322/x
3. Step 3: Cross multiply
   3,947,131x = 8,503,322 × 8,503,322
4. Step 4: Simplify right side
   3,947,131x = 72,306,485,035,684
5. Step 5: Solve for x
   x = 72,306,485,035,684/3,947,131
6. Step 6: Final answer
   x = 18,318,744.69