Finding the Third Proportional to 13,280 and 17,240

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280 : 17,240 = 17,240 : x
2. Step 2: Convert to fraction form
   13,280/17,240 = 17,240/x
3. Step 3: Cross multiply
   13,280x = 17,240 × 17,240
4. Step 4: Simplify right side
   13,280x = 297,217,600
5. Step 5: Solve for x
   x = 297,217,600/13,280
6. Step 6: Final answer
   x = 22,380.84