Finding the Third Proportional to 20,290.50 and 41,809.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,290.50 : 41,809.50 = 41,809.50 : x
2. Step 2: Convert to fraction form
   20,290.50/41,809.50 = 41,809.50/x
3. Step 3: Cross multiply
   20,290.50x = 41,809.50 × 41,809.50
4. Step 4: Simplify right side
   20,290.50x = 1,748,034,290.25
5. Step 5: Solve for x
   x = 1,748,034,290.25/20,290.50
6. Step 6: Final answer
   x = 86,150.38