Finding the Third Proportional to 16,564.50 and 21,012.75

Step by Step Solution

1. Step 1: Write the proportion equation
   16,564.50 : 21,012.75 = 21,012.75 : x
2. Step 2: Convert to fraction form
   16,564.50/21,012.75 = 21,012.75/x
3. Step 3: Cross multiply
   16,564.50x = 21,012.75 × 21,012.75
4. Step 4: Simplify right side
   16,564.50x = 441,535,662.56
5. Step 5: Solve for x
   x = 441,535,662.56/16,564.50
6. Step 6: Final answer
   x = 26,655.54