Finding the Third Proportional to 108,699 and 142,939

Step by Step Solution

1. Step 1: Write the proportion equation
   108,699 : 142,939 = 142,939 : x
2. Step 2: Convert to fraction form
   108,699/142,939 = 142,939/x
3. Step 3: Cross multiply
   108,699x = 142,939 × 142,939
4. Step 4: Simplify right side
   108,699x = 20,431,557,721
5. Step 5: Solve for x
   x = 20,431,557,721/108,699
6. Step 6: Final answer
   x = 187,964.54