Finding the Third Proportional to 10,840 and 17,240

Step by Step Solution

1. Step 1: Write the proportion equation
   10,840 : 17,240 = 17,240 : x
2. Step 2: Convert to fraction form
   10,840/17,240 = 17,240/x
3. Step 3: Cross multiply
   10,840x = 17,240 × 17,240
4. Step 4: Simplify right side
   10,840x = 297,217,600
5. Step 5: Solve for x
   x = 297,217,600/10,840
6. Step 6: Final answer
   x = 27,418.60