Finding the Third Proportional to 12,817 and 17,245

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817 : 17,245 = 17,245 : x
2. Step 2: Convert to fraction form
   12,817/17,245 = 17,245/x
3. Step 3: Cross multiply
   12,817x = 17,245 × 17,245
4. Step 4: Simplify right side
   12,817x = 297,390,025
5. Step 5: Solve for x
   x = 297,390,025/12,817
6. Step 6: Final answer
   x = 23,202.78