Finding the Third Proportional to 12,984 and 20,145

Step by Step Solution

1. Step 1: Write the proportion equation
   12,984 : 20,145 = 20,145 : x
2. Step 2: Convert to fraction form
   12,984/20,145 = 20,145/x
3. Step 3: Cross multiply
   12,984x = 20,145 × 20,145
4. Step 4: Simplify right side
   12,984x = 405,821,025
5. Step 5: Solve for x
   x = 405,821,025/12,984
6. Step 6: Final answer
   x = 31,255.47