Finding the Third Proportional to 12,205.69 and 18,412.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,205.69 : 18,412.31 = 18,412.31 : x
2. Step 2: Convert to fraction form
   12,205.69/18,412.31 = 18,412.31/x
3. Step 3: Cross multiply
   12,205.69x = 18,412.31 × 18,412.31
4. Step 4: Simplify right side
   12,205.69x = 339,013,251.60
5. Step 5: Solve for x
   x = 339,013,251.60/12,205.69
6. Step 6: Final answer
   x = 27,775.02