Finding the Third Proportional to 21,563.50 and 30,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,563.50 : 30,216.50 = 30,216.50 : x
2. Step 2: Convert to fraction form
   21,563.50/30,216.50 = 30,216.50/x
3. Step 3: Cross multiply
   21,563.50x = 30,216.50 × 30,216.50
4. Step 4: Simplify right side
   21,563.50x = 913,036,872.25
5. Step 5: Solve for x
   x = 913,036,872.25/21,563.50
6. Step 6: Final answer
   x = 42,341.78