Finding the Third Proportional to 39,109.50 and 85,992.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,109.50 : 85,992.75 = 85,992.75 : x
2. Step 2: Convert to fraction form
   39,109.50/85,992.75 = 85,992.75/x
3. Step 3: Cross multiply
   39,109.50x = 85,992.75 × 85,992.75
4. Step 4: Simplify right side
   39,109.50x = 7,394,753,052.56
5. Step 5: Solve for x
   x = 7,394,753,052.56/39,109.50
6. Step 6: Final answer
   x = 189,078.18