Finding the Third Proportional to 1,285,388 and 2,715,256

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285,388 : 2,715,256 = 2,715,256 : x
2. Step 2: Convert to fraction form
   1,285,388/2,715,256 = 2,715,256/x
3. Step 3: Cross multiply
   1,285,388x = 2,715,256 × 2,715,256
4. Step 4: Simplify right side
   1,285,388x = 7,372,615,145,536
5. Step 5: Solve for x
   x = 7,372,615,145,536/1,285,388
6. Step 6: Final answer
   x = 5,735,711.82