Finding the Third Proportional to 17,480 and 31,280

Step by Step Solution

1. Step 1: Write the proportion equation
   17,480 : 31,280 = 31,280 : x
2. Step 2: Convert to fraction form
   17,480/31,280 = 31,280/x
3. Step 3: Cross multiply
   17,480x = 31,280 × 31,280
4. Step 4: Simplify right side
   17,480x = 978,438,400
5. Step 5: Solve for x
   x = 978,438,400/17,480
6. Step 6: Final answer
   x = 55,974.74