Finding the Third Proportional to 3,318,720 and 7,238,112

Step by Step Solution

1. Step 1: Write the proportion equation
   3,318,720 : 7,238,112 = 7,238,112 : x
2. Step 2: Convert to fraction form
   3,318,720/7,238,112 = 7,238,112/x
3. Step 3: Cross multiply
   3,318,720x = 7,238,112 × 7,238,112
4. Step 4: Simplify right side
   3,318,720x = 52,390,265,324,544
5. Step 5: Solve for x
   x = 52,390,265,324,544/3,318,720
6. Step 6: Final answer
   x = 15,786,286.68