Finding the Third Proportional to 12,729.75 and 27,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,729.75 : 27,718.50 = 27,718.50 : x
2. Step 2: Convert to fraction form
   12,729.75/27,718.50 = 27,718.50/x
3. Step 3: Cross multiply
   12,729.75x = 27,718.50 × 27,718.50
4. Step 4: Simplify right side
   12,729.75x = 768,315,242.25
5. Step 5: Solve for x
   x = 768,315,242.25/12,729.75
6. Step 6: Final answer
   x = 60,355.88