Finding the Third Proportional to 18,780.25 and 28,111.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,780.25 : 28,111.75 = 28,111.75 : x
2. Step 2: Convert to fraction form
   18,780.25/28,111.75 = 28,111.75/x
3. Step 3: Cross multiply
   18,780.25x = 28,111.75 × 28,111.75
4. Step 4: Simplify right side
   18,780.25x = 790,270,488.06
5. Step 5: Solve for x
   x = 790,270,488.06/18,780.25
6. Step 6: Final answer
   x = 42,079.87