Finding the Third Proportional to 8,712.75 and 13,150.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,712.75 : 13,150.25 = 13,150.25 : x
2. Step 2: Convert to fraction form
   8,712.75/13,150.25 = 13,150.25/x
3. Step 3: Cross multiply
   8,712.75x = 13,150.25 × 13,150.25
4. Step 4: Simplify right side
   8,712.75x = 172,929,075.06
5. Step 5: Solve for x
   x = 172,929,075.06/8,712.75
6. Step 6: Final answer
   x = 19,847.82