Finding the Third Proportional to 303,820 and 654,386

Step by Step Solution

1. Step 1: Write the proportion equation
   303,820 : 654,386 = 654,386 : x
2. Step 2: Convert to fraction form
   303,820/654,386 = 654,386/x
3. Step 3: Cross multiply
   303,820x = 654,386 × 654,386
4. Step 4: Simplify right side
   303,820x = 428,221,036,996
5. Step 5: Solve for x
   x = 428,221,036,996/303,820
6. Step 6: Final answer
   x = 1,409,456.38