Finding the Third Proportional to 11,555 and 17,921

Step by Step Solution

1. Step 1: Write the proportion equation
   11,555 : 17,921 = 17,921 : x
2. Step 2: Convert to fraction form
   11,555/17,921 = 17,921/x
3. Step 3: Cross multiply
   11,555x = 17,921 × 17,921
4. Step 4: Simplify right side
   11,555x = 321,162,241
5. Step 5: Solve for x
   x = 321,162,241/11,555
6. Step 6: Final answer
   x = 27,794.22