Finding the Third Proportional to 9,958 and 13,217

Step by Step Solution

1. Step 1: Write the proportion equation
   9,958 : 13,217 = 13,217 : x
2. Step 2: Convert to fraction form
   9,958/13,217 = 13,217/x
3. Step 3: Cross multiply
   9,958x = 13,217 × 13,217
4. Step 4: Simplify right side
   9,958x = 174,689,089
5. Step 5: Solve for x
   x = 174,689,089/9,958
6. Step 6: Final answer
   x = 17,542.59