Finding the Third Proportional to 3,393,662 and 7,318,678

Step by Step Solution

1. Step 1: Write the proportion equation
   3,393,662 : 7,318,678 = 7,318,678 : x
2. Step 2: Convert to fraction form
   3,393,662/7,318,678 = 7,318,678/x
3. Step 3: Cross multiply
   3,393,662x = 7,318,678 × 7,318,678
4. Step 4: Simplify right side
   3,393,662x = 53,563,047,667,684
5. Step 5: Solve for x
   x = 53,563,047,667,684/3,393,662
6. Step 6: Final answer
   x = 15,783,259.40