Finding the Third Proportional to 12,978 and 27,945

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978 : 27,945 = 27,945 : x
2. Step 2: Convert to fraction form
   12,978/27,945 = 27,945/x
3. Step 3: Cross multiply
   12,978x = 27,945 × 27,945
4. Step 4: Simplify right side
   12,978x = 780,923,025
5. Step 5: Solve for x
   x = 780,923,025/12,978
6. Step 6: Final answer
   x = 60,172.83