Finding the Third Proportional to 3,355,128 and 7,180,456

Step by Step Solution

1. Step 1: Write the proportion equation
   3,355,128 : 7,180,456 = 7,180,456 : x
2. Step 2: Convert to fraction form
   3,355,128/7,180,456 = 7,180,456/x
3. Step 3: Cross multiply
   3,355,128x = 7,180,456 × 7,180,456
4. Step 4: Simplify right side
   3,355,128x = 51,558,948,367,936
5. Step 5: Solve for x
   x = 51,558,948,367,936/3,355,128
6. Step 6: Final answer
   x = 15,367,207.56