Finding the Third Proportional to 10,290.38 and 20,945.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,290.38 : 20,945.25 = 20,945.25 : x
2. Step 2: Convert to fraction form
   10,290.38/20,945.25 = 20,945.25/x
3. Step 3: Cross multiply
   10,290.38x = 20,945.25 × 20,945.25
4. Step 4: Simplify right side
   10,290.38x = 438,703,497.56
5. Step 5: Solve for x
   x = 438,703,497.56/10,290.38
6. Step 6: Final answer
   x = 42,632.41