Finding the Third Proportional to 128,067 and 205,769.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,067 : 205,769.50 = 205,769.50 : x
2. Step 2: Convert to fraction form
   128,067/205,769.50 = 205,769.50/x
3. Step 3: Cross multiply
   128,067x = 205,769.50 × 205,769.50
4. Step 4: Simplify right side
   128,067x = 42,341,087,130.25
5. Step 5: Solve for x
   x = 42,341,087,130.25/128,067
6. Step 6: Final answer
   x = 330,616.69