Finding the Third Proportional to 12,900 and 27,036

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900 : 27,036 = 27,036 : x
2. Step 2: Convert to fraction form
   12,900/27,036 = 27,036/x
3. Step 3: Cross multiply
   12,900x = 27,036 × 27,036
4. Step 4: Simplify right side
   12,900x = 730,945,296
5. Step 5: Solve for x
   x = 730,945,296/12,900
6. Step 6: Final answer
   x = 56,662.43