Finding the Third Proportional to 20,757.09 and 42,991.17

Step by Step Solution

1. Step 1: Write the proportion equation
   20,757.09 : 42,991.17 = 42,991.17 : x
2. Step 2: Convert to fraction form
   20,757.09/42,991.17 = 42,991.17/x
3. Step 3: Cross multiply
   20,757.09x = 42,991.17 × 42,991.17
4. Step 4: Simplify right side
   20,757.09x = 1,848,240,859.19
5. Step 5: Solve for x
   x = 1,848,240,859.19/20,757.09
6. Step 6: Final answer
   x = 89,041.41