Finding the Third Proportional to 8,118.75 and 12,179.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118.75 : 12,179.25 = 12,179.25 : x
2. Step 2: Convert to fraction form
   8,118.75/12,179.25 = 12,179.25/x
3. Step 3: Cross multiply
   8,118.75x = 12,179.25 × 12,179.25
4. Step 4: Simplify right side
   8,118.75x = 148,334,130.56
5. Step 5: Solve for x
   x = 148,334,130.56/8,118.75
6. Step 6: Final answer
   x = 18,270.56