Finding the Third Proportional to 12,649.50 and 18,960.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,649.50 : 18,960.75 = 18,960.75 : x
2. Step 2: Convert to fraction form
   12,649.50/18,960.75 = 18,960.75/x
3. Step 3: Cross multiply
   12,649.50x = 18,960.75 × 18,960.75
4. Step 4: Simplify right side
   12,649.50x = 359,510,040.56
5. Step 5: Solve for x
   x = 359,510,040.56/12,649.50
6. Step 6: Final answer
   x = 28,420.89