Finding the Third Proportional to 20,855.25 and 43,436.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,855.25 : 43,436.25 = 43,436.25 : x
2. Step 2: Convert to fraction form
   20,855.25/43,436.25 = 43,436.25/x
3. Step 3: Cross multiply
   20,855.25x = 43,436.25 × 43,436.25
4. Step 4: Simplify right side
   20,855.25x = 1,886,707,814.06
5. Step 5: Solve for x
   x = 1,886,707,814.06/20,855.25
6. Step 6: Final answer
   x = 90,466.80