Finding the Third Proportional to 15,328 and 21,698

Step by Step Solution

1. Step 1: Write the proportion equation
   15,328 : 21,698 = 21,698 : x
2. Step 2: Convert to fraction form
   15,328/21,698 = 21,698/x
3. Step 3: Cross multiply
   15,328x = 21,698 × 21,698
4. Step 4: Simplify right side
   15,328x = 470,803,204
5. Step 5: Solve for x
   x = 470,803,204/15,328
6. Step 6: Final answer
   x = 30,715.24