Finding the Third Proportional to 20,591 and 41,910.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,591 : 41,910.50 = 41,910.50 : x
2. Step 2: Convert to fraction form
   20,591/41,910.50 = 41,910.50/x
3. Step 3: Cross multiply
   20,591x = 41,910.50 × 41,910.50
4. Step 4: Simplify right side
   20,591x = 1,756,490,010.25
5. Step 5: Solve for x
   x = 1,756,490,010.25/20,591
6. Step 6: Final answer
   x = 85,303.77