Finding the Third Proportional to 10,856 and 15,404

Step by Step Solution

1. Step 1: Write the proportion equation
   10,856 : 15,404 = 15,404 : x
2. Step 2: Convert to fraction form
   10,856/15,404 = 15,404/x
3. Step 3: Cross multiply
   10,856x = 15,404 × 15,404
4. Step 4: Simplify right side
   10,856x = 237,283,216
5. Step 5: Solve for x
   x = 237,283,216/10,856
6. Step 6: Final answer
   x = 21,857.33