Finding the Third Proportional to 12,420.50 and 18,234.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,420.50 : 18,234.75 = 18,234.75 : x
2. Step 2: Convert to fraction form
   12,420.50/18,234.75 = 18,234.75/x
3. Step 3: Cross multiply
   12,420.50x = 18,234.75 × 18,234.75
4. Step 4: Simplify right side
   12,420.50x = 332,506,107.56
5. Step 5: Solve for x
   x = 332,506,107.56/12,420.50
6. Step 6: Final answer
   x = 26,770.75