Finding the Third Proportional to 20,656.69 and 42,535.97

Step by Step Solution

1. Step 1: Write the proportion equation
   20,656.69 : 42,535.97 = 42,535.97 : x
2. Step 2: Convert to fraction form
   20,656.69/42,535.97 = 42,535.97/x
3. Step 3: Cross multiply
   20,656.69x = 42,535.97 × 42,535.97
4. Step 4: Simplify right side
   20,656.69x = 1,809,308,637.50
5. Step 5: Solve for x
   x = 1,809,308,637.50/20,656.69
6. Step 6: Final answer
   x = 87,589.49