Finding the Third Proportional to 8,081.25 and 12,131.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,081.25 : 12,131.25 = 12,131.25 : x
2. Step 2: Convert to fraction form
   8,081.25/12,131.25 = 12,131.25/x
3. Step 3: Cross multiply
   8,081.25x = 12,131.25 × 12,131.25
4. Step 4: Simplify right side
   8,081.25x = 147,167,226.56
5. Step 5: Solve for x
   x = 147,167,226.56/8,081.25
6. Step 6: Final answer
   x = 18,210.95