Finding the Third Proportional to 18,938.25 and 28,290.38

Step by Step Solution

1. Step 1: Write the proportion equation
   18,938.25 : 28,290.38 = 28,290.38 : x
2. Step 2: Convert to fraction form
   18,938.25/28,290.38 = 28,290.38/x
3. Step 3: Cross multiply
   18,938.25x = 28,290.38 × 28,290.38
4. Step 4: Simplify right side
   18,938.25x = 800,345,317.64
5. Step 5: Solve for x
   x = 800,345,317.64/18,938.25
6. Step 6: Final answer
   x = 42,260.79