Finding the Third Proportional to 3,935,772 and 8,491,680

Step by Step Solution

1. Step 1: Write the proportion equation
   3,935,772 : 8,491,680 = 8,491,680 : x
2. Step 2: Convert to fraction form
   3,935,772/8,491,680 = 8,491,680/x
3. Step 3: Cross multiply
   3,935,772x = 8,491,680 × 8,491,680
4. Step 4: Simplify right side
   3,935,772x = 72,108,629,222,400
5. Step 5: Solve for x
   x = 72,108,629,222,400/3,935,772
6. Step 6: Final answer
   x = 18,321,343.11