Finding the Third Proportional to 67,321.50 and 145,786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,321.50 : 145,786.50 = 145,786.50 : x
2. Step 2: Convert to fraction form
   67,321.50/145,786.50 = 145,786.50/x
3. Step 3: Cross multiply
   67,321.50x = 145,786.50 × 145,786.50
4. Step 4: Simplify right side
   67,321.50x = 21,253,703,582.25
5. Step 5: Solve for x
   x = 21,253,703,582.25/67,321.50
6. Step 6: Final answer
   x = 315,704.55