Finding the Third Proportional to 12,992 and 20,148

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992 : 20,148 = 20,148 : x
2. Step 2: Convert to fraction form
   12,992/20,148 = 20,148/x
3. Step 3: Cross multiply
   12,992x = 20,148 × 20,148
4. Step 4: Simplify right side
   12,992x = 405,941,904
5. Step 5: Solve for x
   x = 405,941,904/12,992
6. Step 6: Final answer
   x = 31,245.53