Finding the Third Proportional to 20,662.88 and 30,690.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,662.88 : 30,690.38 = 30,690.38 : x
2. Step 2: Convert to fraction form
   20,662.88/30,690.38 = 30,690.38/x
3. Step 3: Cross multiply
   20,662.88x = 30,690.38 × 30,690.38
4. Step 4: Simplify right side
   20,662.88x = 941,899,117.64
5. Step 5: Solve for x
   x = 941,899,117.64/20,662.88
6. Step 6: Final answer
   x = 45,584.13