Finding the Third Proportional to 8,563.50 and 13,588.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,563.50 : 13,588.50 = 13,588.50 : x
2. Step 2: Convert to fraction form
   8,563.50/13,588.50 = 13,588.50/x
3. Step 3: Cross multiply
   8,563.50x = 13,588.50 × 13,588.50
4. Step 4: Simplify right side
   8,563.50x = 184,647,332.25
5. Step 5: Solve for x
   x = 184,647,332.25/8,563.50
6. Step 6: Final answer
   x = 21,562.13