Finding the Third Proportional to 3,317,820 and 7,278,456

Step by Step Solution

1. Step 1: Write the proportion equation
   3,317,820 : 7,278,456 = 7,278,456 : x
2. Step 2: Convert to fraction form
   3,317,820/7,278,456 = 7,278,456/x
3. Step 3: Cross multiply
   3,317,820x = 7,278,456 × 7,278,456
4. Step 4: Simplify right side
   3,317,820x = 52,975,921,743,936
5. Step 5: Solve for x
   x = 52,975,921,743,936/3,317,820
6. Step 6: Final answer
   x = 15,967,087.35