Finding the Third Proportional to 149,870.25 and 321,975

Step by Step Solution

1. Step 1: Write the proportion equation
   149,870.25 : 321,975 = 321,975 : x
2. Step 2: Convert to fraction form
   149,870.25/321,975 = 321,975/x
3. Step 3: Cross multiply
   149,870.25x = 321,975 × 321,975
4. Step 4: Simplify right side
   149,870.25x = 103,667,900,625
5. Step 5: Solve for x
   x = 103,667,900,625/149,870.25
6. Step 6: Final answer
   x = 691,717.67