Finding the Third Proportional to 19,809 and 42,162

Step by Step Solution

1. Step 1: Write the proportion equation
   19,809 : 42,162 = 42,162 : x
2. Step 2: Convert to fraction form
   19,809/42,162 = 42,162/x
3. Step 3: Cross multiply
   19,809x = 42,162 × 42,162
4. Step 4: Simplify right side
   19,809x = 1,777,634,244
5. Step 5: Solve for x
   x = 1,777,634,244/19,809
6. Step 6: Final answer
   x = 89,738.72