Finding the Third Proportional to 8,118 and 12,265.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118 : 12,265.50 = 12,265.50 : x
2. Step 2: Convert to fraction form
   8,118/12,265.50 = 12,265.50/x
3. Step 3: Cross multiply
   8,118x = 12,265.50 × 12,265.50
4. Step 4: Simplify right side
   8,118x = 150,442,490.25
5. Step 5: Solve for x
   x = 150,442,490.25/8,118
6. Step 6: Final answer
   x = 18,531.96