Finding the Third Proportional to 13,280 and 17,620

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280 : 17,620 = 17,620 : x
2. Step 2: Convert to fraction form
   13,280/17,620 = 17,620/x
3. Step 3: Cross multiply
   13,280x = 17,620 × 17,620
4. Step 4: Simplify right side
   13,280x = 310,464,400
5. Step 5: Solve for x
   x = 310,464,400/13,280
6. Step 6: Final answer
   x = 23,378.34