Finding the Third Proportional to 10,228.78 and 13,745.64

Step by Step Solution

1. Step 1: Write the proportion equation
   10,228.78 : 13,745.64 = 13,745.64 : x
2. Step 2: Convert to fraction form
   10,228.78/13,745.64 = 13,745.64/x
3. Step 3: Cross multiply
   10,228.78x = 13,745.64 × 13,745.64
4. Step 4: Simplify right side
   10,228.78x = 188,942,528.80
5. Step 5: Solve for x
   x = 188,942,528.80/10,228.78
6. Step 6: Final answer
   x = 18,471.66