Finding the Third Proportional to 10,396.79 and 21,485.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,396.79 : 21,485.57 = 21,485.57 : x
2. Step 2: Convert to fraction form
   10,396.79/21,485.57 = 21,485.57/x
3. Step 3: Cross multiply
   10,396.79x = 21,485.57 × 21,485.57
4. Step 4: Simplify right side
   10,396.79x = 461,629,563.80
5. Step 5: Solve for x
   x = 461,629,563.80/10,396.79
6. Step 6: Final answer
   x = 44,401.15