Finding the Third Proportional to 9,928 and 19,580

Step by Step Solution

1. Step 1: Write the proportion equation
   9,928 : 19,580 = 19,580 : x
2. Step 2: Convert to fraction form
   9,928/19,580 = 19,580/x
3. Step 3: Cross multiply
   9,928x = 19,580 × 19,580
4. Step 4: Simplify right side
   9,928x = 383,376,400
5. Step 5: Solve for x
   x = 383,376,400/9,928
6. Step 6: Final answer
   x = 38,615.67