Finding the Third Proportional to 12,200 and 19,356

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200 : 19,356 = 19,356 : x
2. Step 2: Convert to fraction form
   12,200/19,356 = 19,356/x
3. Step 3: Cross multiply
   12,200x = 19,356 × 19,356
4. Step 4: Simplify right side
   12,200x = 374,654,736
5. Step 5: Solve for x
   x = 374,654,736/12,200
6. Step 6: Final answer
   x = 30,709.40