Finding the Third Proportional to 68,139 and 144,067.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,139 : 144,067.50 = 144,067.50 : x
2. Step 2: Convert to fraction form
   68,139/144,067.50 = 144,067.50/x
3. Step 3: Cross multiply
   68,139x = 144,067.50 × 144,067.50
4. Step 4: Simplify right side
   68,139x = 20,755,444,556.25
5. Step 5: Solve for x
   x = 20,755,444,556.25/68,139
6. Step 6: Final answer
   x = 304,604.48