Finding the Third Proportional to 326,119.50 and 515,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,119.50 : 515,443.50 = 515,443.50 : x
2. Step 2: Convert to fraction form
   326,119.50/515,443.50 = 515,443.50/x
3. Step 3: Cross multiply
   326,119.50x = 515,443.50 × 515,443.50
4. Step 4: Simplify right side
   326,119.50x = 265,682,001,692.25
5. Step 5: Solve for x
   x = 265,682,001,692.25/326,119.50
6. Step 6: Final answer
   x = 814,676.83