Finding the Third Proportional to 10,219.50 and 20,245.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,219.50 : 20,245.50 = 20,245.50 : x
2. Step 2: Convert to fraction form
   10,219.50/20,245.50 = 20,245.50/x
3. Step 3: Cross multiply
   10,219.50x = 20,245.50 × 20,245.50
4. Step 4: Simplify right side
   10,219.50x = 409,880,270.25
5. Step 5: Solve for x
   x = 409,880,270.25/10,219.50
6. Step 6: Final answer
   x = 40,107.66