Finding the Third Proportional to 9,916 and 13,206

Step by Step Solution

1. Step 1: Write the proportion equation
   9,916 : 13,206 = 13,206 : x
2. Step 2: Convert to fraction form
   9,916/13,206 = 13,206/x
3. Step 3: Cross multiply
   9,916x = 13,206 × 13,206
4. Step 4: Simplify right side
   9,916x = 174,398,436
5. Step 5: Solve for x
   x = 174,398,436/9,916
6. Step 6: Final answer
   x = 17,587.58