Finding the Third Proportional to 17,420 and 25,720

Step by Step Solution

1. Step 1: Write the proportion equation
   17,420 : 25,720 = 25,720 : x
2. Step 2: Convert to fraction form
   17,420/25,720 = 25,720/x
3. Step 3: Cross multiply
   17,420x = 25,720 × 25,720
4. Step 4: Simplify right side
   17,420x = 661,518,400
5. Step 5: Solve for x
   x = 661,518,400/17,420
6. Step 6: Final answer
   x = 37,974.65