Finding the Third Proportional to 9,621.50 and 21,020

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.50 : 21,020 = 21,020 : x
2. Step 2: Convert to fraction form
   9,621.50/21,020 = 21,020/x
3. Step 3: Cross multiply
   9,621.50x = 21,020 × 21,020
4. Step 4: Simplify right side
   9,621.50x = 441,840,400
5. Step 5: Solve for x
   x = 441,840,400/9,621.50
6. Step 6: Final answer
   x = 45,922.20