Finding the Third Proportional to 212,619 and 326,245.50

Step by Step Solution

1. Step 1: Write the proportion equation
   212,619 : 326,245.50 = 326,245.50 : x
2. Step 2: Convert to fraction form
   212,619/326,245.50 = 326,245.50/x
3. Step 3: Cross multiply
   212,619x = 326,245.50 × 326,245.50
4. Step 4: Simplify right side
   212,619x = 106,436,126,270.25
5. Step 5: Solve for x
   x = 106,436,126,270.25/212,619
6. Step 6: Final answer
   x = 500,595.55