Finding the Third Proportional to 8,711 and 13,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,711 : 13,147.50 = 13,147.50 : x
2. Step 2: Convert to fraction form
   8,711/13,147.50 = 13,147.50/x
3. Step 3: Cross multiply
   8,711x = 13,147.50 × 13,147.50
4. Step 4: Simplify right side
   8,711x = 172,856,756.25
5. Step 5: Solve for x
   x = 172,856,756.25/8,711
6. Step 6: Final answer
   x = 19,843.50