Finding the Third Proportional to 678,456 and 1,426,653

Step by Step Solution

1. Step 1: Write the proportion equation
   678,456 : 1,426,653 = 1,426,653 : x
2. Step 2: Convert to fraction form
   678,456/1,426,653 = 1,426,653/x
3. Step 3: Cross multiply
   678,456x = 1,426,653 × 1,426,653
4. Step 4: Simplify right side
   678,456x = 2,035,338,782,409
5. Step 5: Solve for x
   x = 2,035,338,782,409/678,456
6. Step 6: Final answer
   x = 2,999,956.94