Finding the Third Proportional to 158,403 and 328,033.50

Step by Step Solution

1. Step 1: Write the proportion equation
   158,403 : 328,033.50 = 328,033.50 : x
2. Step 2: Convert to fraction form
   158,403/328,033.50 = 328,033.50/x
3. Step 3: Cross multiply
   158,403x = 328,033.50 × 328,033.50
4. Step 4: Simplify right side
   158,403x = 107,605,977,122.25
5. Step 5: Solve for x
   x = 107,605,977,122.25/158,403
6. Step 6: Final answer
   x = 679,317.80