Finding the Third Proportional to 6,428,320 and 8,730,456

Step by Step Solution

1. Step 1: Write the proportion equation
   6,428,320 : 8,730,456 = 8,730,456 : x
2. Step 2: Convert to fraction form
   6,428,320/8,730,456 = 8,730,456/x
3. Step 3: Cross multiply
   6,428,320x = 8,730,456 × 8,730,456
4. Step 4: Simplify right side
   6,428,320x = 76,220,861,967,936
5. Step 5: Solve for x
   x = 76,220,861,967,936/6,428,320
6. Step 6: Final answer
   x = 11,857,042.27