Finding the Third Proportional to 8,305 and 12,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,305 : 12,434.50 = 12,434.50 : x
2. Step 2: Convert to fraction form
   8,305/12,434.50 = 12,434.50/x
3. Step 3: Cross multiply
   8,305x = 12,434.50 × 12,434.50
4. Step 4: Simplify right side
   8,305x = 154,616,790.25
5. Step 5: Solve for x
   x = 154,616,790.25/8,305
6. Step 6: Final answer
   x = 18,617.31