Finding the Third Proportional to 13,144.78 and 19,728.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.78 : 19,728.56 = 19,728.56 : x
2. Step 2: Convert to fraction form
   13,144.78/19,728.56 = 19,728.56/x
3. Step 3: Cross multiply
   13,144.78x = 19,728.56 × 19,728.56
4. Step 4: Simplify right side
   13,144.78x = 389,216,178.32
5. Step 5: Solve for x
   x = 389,216,178.32/13,144.78
6. Step 6: Final answer
   x = 29,609.94