Finding the Third Proportional to 7,760 and 12,500

Step by Step Solution

1. Step 1: Write the proportion equation
   7,760 : 12,500 = 12,500 : x
2. Step 2: Convert to fraction form
   7,760/12,500 = 12,500/x
3. Step 3: Cross multiply
   7,760x = 12,500 × 12,500
4. Step 4: Simplify right side
   7,760x = 156,250,000
5. Step 5: Solve for x
   x = 156,250,000/7,760
6. Step 6: Final answer
   x = 20,135.31