Finding the Third Proportional to 8,130.38 and 12,126.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,130.38 : 12,126.75 = 12,126.75 : x
2. Step 2: Convert to fraction form
   8,130.38/12,126.75 = 12,126.75/x
3. Step 3: Cross multiply
   8,130.38x = 12,126.75 × 12,126.75
4. Step 4: Simplify right side
   8,130.38x = 147,058,065.56
5. Step 5: Solve for x
   x = 147,058,065.56/8,130.38
6. Step 6: Final answer
   x = 18,087.49