Finding the Third Proportional to 19,830 and 30,687

Step by Step Solution

1. Step 1: Write the proportion equation
   19,830 : 30,687 = 30,687 : x
2. Step 2: Convert to fraction form
   19,830/30,687 = 30,687/x
3. Step 3: Cross multiply
   19,830x = 30,687 × 30,687
4. Step 4: Simplify right side
   19,830x = 941,691,969
5. Step 5: Solve for x
   x = 941,691,969/19,830
6. Step 6: Final answer
   x = 47,488.25