Finding the Third Proportional to 9,621.28 and 20,680.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.28 : 20,680.31 = 20,680.31 : x
2. Step 2: Convert to fraction form
   9,621.28/20,680.31 = 20,680.31/x
3. Step 3: Cross multiply
   9,621.28x = 20,680.31 × 20,680.31
4. Step 4: Simplify right side
   9,621.28x = 427,675,325.10
5. Step 5: Solve for x
   x = 427,675,325.10/9,621.28
6. Step 6: Final answer
   x = 44,450.97