Finding the Third Proportional to 19,839 and 31,899

Step by Step Solution

1. Step 1: Write the proportion equation
   19,839 : 31,899 = 31,899 : x
2. Step 2: Convert to fraction form
   19,839/31,899 = 31,899/x
3. Step 3: Cross multiply
   19,839x = 31,899 × 31,899
4. Step 4: Simplify right side
   19,839x = 1,017,546,201
5. Step 5: Solve for x
   x = 1,017,546,201/19,839
6. Step 6: Final answer
   x = 51,290.20