Finding the Third Proportional to 20,478.75 and 30,906.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,478.75 : 30,906.38 = 30,906.38 : x
2. Step 2: Convert to fraction form
   20,478.75/30,906.38 = 30,906.38/x
3. Step 3: Cross multiply
   20,478.75x = 30,906.38 × 30,906.38
4. Step 4: Simplify right side
   20,478.75x = 955,204,015.64
5. Step 5: Solve for x
   x = 955,204,015.64/20,478.75
6. Step 6: Final answer
   x = 46,643.67