Finding the Third Proportional to 13,120 and 17,040

Step by Step Solution

1. Step 1: Write the proportion equation
   13,120 : 17,040 = 17,040 : x
2. Step 2: Convert to fraction form
   13,120/17,040 = 17,040/x
3. Step 3: Cross multiply
   13,120x = 17,040 × 17,040
4. Step 4: Simplify right side
   13,120x = 290,361,600
5. Step 5: Solve for x
   x = 290,361,600/13,120
6. Step 6: Final answer
   x = 22,131.22