Finding the Third Proportional to 21,912.75 and 21,912.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,912.75 : 21,912.75 = 21,912.75 : x
2. Step 2: Convert to fraction form
   21,912.75/21,912.75 = 21,912.75/x
3. Step 3: Cross multiply
   21,912.75x = 21,912.75 × 21,912.75
4. Step 4: Simplify right side
   21,912.75x = 480,168,612.56
5. Step 5: Solve for x
   x = 480,168,612.56/21,912.75
6. Step 6: Final answer
   x = 21,912.75