Finding the Third Proportional to 8,225 and 12,740

Step by Step Solution

1. Step 1: Write the proportion equation
   8,225 : 12,740 = 12,740 : x
2. Step 2: Convert to fraction form
   8,225/12,740 = 12,740/x
3. Step 3: Cross multiply
   8,225x = 12,740 × 12,740
4. Step 4: Simplify right side
   8,225x = 162,307,600
5. Step 5: Solve for x
   x = 162,307,600/8,225
6. Step 6: Final answer
   x = 19,733.45