Finding the Third Proportional to 20,976.75 and 40,890.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,976.75 : 40,890.38 = 40,890.38 : x
2. Step 2: Convert to fraction form
   20,976.75/40,890.38 = 40,890.38/x
3. Step 3: Cross multiply
   20,976.75x = 40,890.38 × 40,890.38
4. Step 4: Simplify right side
   20,976.75x = 1,672,022,767.64
5. Step 5: Solve for x
   x = 1,672,022,767.64/20,976.75
6. Step 6: Final answer
   x = 79,708.38