Finding the Third Proportional to 326,199 and 487,780.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,199 : 487,780.50 = 487,780.50 : x
2. Step 2: Convert to fraction form
   326,199/487,780.50 = 487,780.50/x
3. Step 3: Cross multiply
   326,199x = 487,780.50 × 487,780.50
4. Step 4: Simplify right side
   326,199x = 237,929,816,180.25
5. Step 5: Solve for x
   x = 237,929,816,180.25/326,199
6. Step 6: Final answer
   x = 729,400.81