Finding the Third Proportional to 1,279,700 and 2,800,456

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279,700 : 2,800,456 = 2,800,456 : x
2. Step 2: Convert to fraction form
   1,279,700/2,800,456 = 2,800,456/x
3. Step 3: Cross multiply
   1,279,700x = 2,800,456 × 2,800,456
4. Step 4: Simplify right side
   1,279,700x = 7,842,553,807,936
5. Step 5: Solve for x
   x = 7,842,553,807,936/1,279,700
6. Step 6: Final answer
   x = 6,128,431.51