Finding the Third Proportional to 678,556 and 1,019,372

Step by Step Solution

1. Step 1: Write the proportion equation
   678,556 : 1,019,372 = 1,019,372 : x
2. Step 2: Convert to fraction form
   678,556/1,019,372 = 1,019,372/x
3. Step 3: Cross multiply
   678,556x = 1,019,372 × 1,019,372
4. Step 4: Simplify right side
   678,556x = 1,039,119,274,384
5. Step 5: Solve for x
   x = 1,039,119,274,384/678,556
6. Step 6: Final answer
   x = 1,531,368.49