Finding the Third Proportional to 13,836 and 20,789

Step by Step Solution

1. Step 1: Write the proportion equation
   13,836 : 20,789 = 20,789 : x
2. Step 2: Convert to fraction form
   13,836/20,789 = 20,789/x
3. Step 3: Cross multiply
   13,836x = 20,789 × 20,789
4. Step 4: Simplify right side
   13,836x = 432,182,521
5. Step 5: Solve for x
   x = 432,182,521/13,836
6. Step 6: Final answer
   x = 31,236.09