Finding the Third Proportional to 16,816.50 and 21,192.75

Step by Step Solution

1. Step 1: Write the proportion equation
   16,816.50 : 21,192.75 = 21,192.75 : x
2. Step 2: Convert to fraction form
   16,816.50/21,192.75 = 21,192.75/x
3. Step 3: Cross multiply
   16,816.50x = 21,192.75 × 21,192.75
4. Step 4: Simplify right side
   16,816.50x = 449,132,652.56
5. Step 5: Solve for x
   x = 449,132,652.56/16,816.50
6. Step 6: Final answer
   x = 26,707.86