Finding the Third Proportional to 8,488.50 and 12,748.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,488.50 : 12,748.75 = 12,748.75 : x
2. Step 2: Convert to fraction form
   8,488.50/12,748.75 = 12,748.75/x
3. Step 3: Cross multiply
   8,488.50x = 12,748.75 × 12,748.75
4. Step 4: Simplify right side
   8,488.50x = 162,530,626.56
5. Step 5: Solve for x
   x = 162,530,626.56/8,488.50
6. Step 6: Final answer
   x = 19,147.16