Finding the Third Proportional to 9,128 and 13,672

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128 : 13,672 = 13,672 : x
2. Step 2: Convert to fraction form
   9,128/13,672 = 13,672/x
3. Step 3: Cross multiply
   9,128x = 13,672 × 13,672
4. Step 4: Simplify right side
   9,128x = 186,923,584
5. Step 5: Solve for x
   x = 186,923,584/9,128
6. Step 6: Final answer
   x = 20,478.04