Finding the Third Proportional to 20,379 and 42,067.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,379 : 42,067.50 = 42,067.50 : x
2. Step 2: Convert to fraction form
   20,379/42,067.50 = 42,067.50/x
3. Step 3: Cross multiply
   20,379x = 42,067.50 × 42,067.50
4. Step 4: Simplify right side
   20,379x = 1,769,674,556.25
5. Step 5: Solve for x
   x = 1,769,674,556.25/20,379
6. Step 6: Final answer
   x = 86,838.14