Finding the Third Proportional to 8,100 and 12,208.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100 : 12,208.50 = 12,208.50 : x
2. Step 2: Convert to fraction form
   8,100/12,208.50 = 12,208.50/x
3. Step 3: Cross multiply
   8,100x = 12,208.50 × 12,208.50
4. Step 4: Simplify right side
   8,100x = 149,047,472.25
5. Step 5: Solve for x
   x = 149,047,472.25/8,100
6. Step 6: Final answer
   x = 18,400.92