Finding the Third Proportional to 310,449 and 679,015.50

Step by Step Solution

1. Step 1: Write the proportion equation
   310,449 : 679,015.50 = 679,015.50 : x
2. Step 2: Convert to fraction form
   310,449/679,015.50 = 679,015.50/x
3. Step 3: Cross multiply
   310,449x = 679,015.50 × 679,015.50
4. Step 4: Simplify right side
   310,449x = 461,062,049,240.25
5. Step 5: Solve for x
   x = 461,062,049,240.25/310,449
6. Step 6: Final answer
   x = 1,485,145.87