Finding the Third Proportional to 326,155.50 and 518,878.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,155.50 : 518,878.50 = 518,878.50 : x
2. Step 2: Convert to fraction form
   326,155.50/518,878.50 = 518,878.50/x
3. Step 3: Cross multiply
   326,155.50x = 518,878.50 × 518,878.50
4. Step 4: Simplify right side
   326,155.50x = 269,234,897,762.25
5. Step 5: Solve for x
   x = 269,234,897,762.25/326,155.50
6. Step 6: Final answer
   x = 825,480.17