Finding the Third Proportional to 8,478 and 13,079

Step by Step Solution

1. Step 1: Write the proportion equation
   8,478 : 13,079 = 13,079 : x
2. Step 2: Convert to fraction form
   8,478/13,079 = 13,079/x
3. Step 3: Cross multiply
   8,478x = 13,079 × 13,079
4. Step 4: Simplify right side
   8,478x = 171,060,241
5. Step 5: Solve for x
   x = 171,060,241/8,478
6. Step 6: Final answer
   x = 20,176.96