Finding the Third Proportional to 8,155.69 and 12,404.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.69 : 12,404.39 = 12,404.39 : x
2. Step 2: Convert to fraction form
   8,155.69/12,404.39 = 12,404.39/x
3. Step 3: Cross multiply
   8,155.69x = 12,404.39 × 12,404.39
4. Step 4: Simplify right side
   8,155.69x = 153,868,906.78
5. Step 5: Solve for x
   x = 153,868,906.78/8,155.69
6. Step 6: Final answer
   x = 18,866.45