Finding the Third Proportional to 20,656 and 43,216

Step by Step Solution

1. Step 1: Write the proportion equation
   20,656 : 43,216 = 43,216 : x
2. Step 2: Convert to fraction form
   20,656/43,216 = 43,216/x
3. Step 3: Cross multiply
   20,656x = 43,216 × 43,216
4. Step 4: Simplify right side
   20,656x = 1,867,622,656
5. Step 5: Solve for x
   x = 1,867,622,656/20,656
6. Step 6: Final answer
   x = 90,415.50