Finding the Third Proportional to 4,390.50 and 9,570

Step by Step Solution

1. Step 1: Write the proportion equation
   4,390.50 : 9,570 = 9,570 : x
2. Step 2: Convert to fraction form
   4,390.50/9,570 = 9,570/x
3. Step 3: Cross multiply
   4,390.50x = 9,570 × 9,570
4. Step 4: Simplify right side
   4,390.50x = 91,584,900
5. Step 5: Solve for x
   x = 91,584,900/4,390.50
6. Step 6: Final answer
   x = 20,859.79