Finding the Third Proportional to 642,018 and 1,366,980

Step by Step Solution

1. Step 1: Write the proportion equation
   642,018 : 1,366,980 = 1,366,980 : x
2. Step 2: Convert to fraction form
   642,018/1,366,980 = 1,366,980/x
3. Step 3: Cross multiply
   642,018x = 1,366,980 × 1,366,980
4. Step 4: Simplify right side
   642,018x = 1,868,634,320,400
5. Step 5: Solve for x
   x = 1,868,634,320,400/642,018
6. Step 6: Final answer
   x = 2,910,563.75