Finding the Third Proportional to 12,789 and 18,693

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789 : 18,693 = 18,693 : x
2. Step 2: Convert to fraction form
   12,789/18,693 = 18,693/x
3. Step 3: Cross multiply
   12,789x = 18,693 × 18,693
4. Step 4: Simplify right side
   12,789x = 349,428,249
5. Step 5: Solve for x
   x = 349,428,249/12,789
6. Step 6: Final answer
   x = 27,322.56