Finding the Third Proportional to 3,919,200 and 8,398,272

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919,200 : 8,398,272 = 8,398,272 : x
2. Step 2: Convert to fraction form
   3,919,200/8,398,272 = 8,398,272/x
3. Step 3: Cross multiply
   3,919,200x = 8,398,272 × 8,398,272
4. Step 4: Simplify right side
   3,919,200x = 70,530,972,585,984
5. Step 5: Solve for x
   x = 70,530,972,585,984/3,919,200
6. Step 6: Final answer
   x = 17,996,267.76