Finding the Third Proportional to 16,830 and 21,912.75

Step by Step Solution

1. Step 1: Write the proportion equation
   16,830 : 21,912.75 = 21,912.75 : x
2. Step 2: Convert to fraction form
   16,830/21,912.75 = 21,912.75/x
3. Step 3: Cross multiply
   16,830x = 21,912.75 × 21,912.75
4. Step 4: Simplify right side
   16,830x = 480,168,612.56
5. Step 5: Solve for x
   x = 480,168,612.56/16,830
6. Step 6: Final answer
   x = 28,530.52