Finding the Third Proportional to 326,772 and 717,979.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,772 : 717,979.50 = 717,979.50 : x
2. Step 2: Convert to fraction form
   326,772/717,979.50 = 717,979.50/x
3. Step 3: Cross multiply
   326,772x = 717,979.50 × 717,979.50
4. Step 4: Simplify right side
   326,772x = 515,494,562,420.25
5. Step 5: Solve for x
   x = 515,494,562,420.25/326,772
6. Step 6: Final answer
   x = 1,577,535.90