Finding the Third Proportional to 8,231.63 and 12,256.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,231.63 : 12,256.31 = 12,256.31 : x
2. Step 2: Convert to fraction form
   8,231.63/12,256.31 = 12,256.31/x
3. Step 3: Cross multiply
   8,231.63x = 12,256.31 × 12,256.31
4. Step 4: Simplify right side
   8,231.63x = 150,217,196.10
5. Step 5: Solve for x
   x = 150,217,196.10/8,231.63
6. Step 6: Final answer
   x = 18,248.79