Finding the Third Proportional to 19,920 and 30,580

Step by Step Solution

1. Step 1: Write the proportion equation
   19,920 : 30,580 = 30,580 : x
2. Step 2: Convert to fraction form
   19,920/30,580 = 30,580/x
3. Step 3: Cross multiply
   19,920x = 30,580 × 30,580
4. Step 4: Simplify right side
   19,920x = 935,136,400
5. Step 5: Solve for x
   x = 935,136,400/19,920
6. Step 6: Final answer
   x = 46,944.60