Finding the Third Proportional to 8,398 and 13,146

Step by Step Solution

1. Step 1: Write the proportion equation
   8,398 : 13,146 = 13,146 : x
2. Step 2: Convert to fraction form
   8,398/13,146 = 13,146/x
3. Step 3: Cross multiply
   8,398x = 13,146 × 13,146
4. Step 4: Simplify right side
   8,398x = 172,817,316
5. Step 5: Solve for x
   x = 172,817,316/8,398
6. Step 6: Final answer
   x = 20,578.39