Finding the Third Proportional to 12,780 and 27,108

Step by Step Solution

1. Step 1: Write the proportion equation
   12,780 : 27,108 = 27,108 : x
2. Step 2: Convert to fraction form
   12,780/27,108 = 27,108/x
3. Step 3: Cross multiply
   12,780x = 27,108 × 27,108
4. Step 4: Simplify right side
   12,780x = 734,843,664
5. Step 5: Solve for x
   x = 734,843,664/12,780
6. Step 6: Final answer
   x = 57,499.50