Finding the Third Proportional to 149,814.75 and 321,864

Step by Step Solution

1. Step 1: Write the proportion equation
   149,814.75 : 321,864 = 321,864 : x
2. Step 2: Convert to fraction form
   149,814.75/321,864 = 321,864/x
3. Step 3: Cross multiply
   149,814.75x = 321,864 × 321,864
4. Step 4: Simplify right side
   149,814.75x = 103,596,434,496
5. Step 5: Solve for x
   x = 103,596,434,496/149,814.75
6. Step 6: Final answer
   x = 691,496.90