Finding the Third Proportional to 9,688 and 20,912

Step by Step Solution

1. Step 1: Write the proportion equation
   9,688 : 20,912 = 20,912 : x
2. Step 2: Convert to fraction form
   9,688/20,912 = 20,912/x
3. Step 3: Cross multiply
   9,688x = 20,912 × 20,912
4. Step 4: Simplify right side
   9,688x = 437,311,744
5. Step 5: Solve for x
   x = 437,311,744/9,688
6. Step 6: Final answer
   x = 45,139.53