Finding the Third Proportional to 309,030 and 677,100

Step by Step Solution

1. Step 1: Write the proportion equation
   309,030 : 677,100 = 677,100 : x
2. Step 2: Convert to fraction form
   309,030/677,100 = 677,100/x
3. Step 3: Cross multiply
   309,030x = 677,100 × 677,100
4. Step 4: Simplify right side
   309,030x = 458,464,410,000
5. Step 5: Solve for x
   x = 458,464,410,000/309,030
6. Step 6: Final answer
   x = 1,483,559.56