Finding the Third Proportional to 8,178.38 and 12,588.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,178.38 : 12,588.38 = 12,588.38 : x
2. Step 2: Convert to fraction form
   8,178.38/12,588.38 = 12,588.38/x
3. Step 3: Cross multiply
   8,178.38x = 12,588.38 × 12,588.38
4. Step 4: Simplify right side
   8,178.38x = 158,467,185.14
5. Step 5: Solve for x
   x = 158,467,185.14/8,178.38
6. Step 6: Final answer
   x = 19,376.37