Finding the Third Proportional to 19,939 and 42,306

Step by Step Solution

1. Step 1: Write the proportion equation
   19,939 : 42,306 = 42,306 : x
2. Step 2: Convert to fraction form
   19,939/42,306 = 42,306/x
3. Step 3: Cross multiply
   19,939x = 42,306 × 42,306
4. Step 4: Simplify right side
   19,939x = 1,789,797,636
5. Step 5: Solve for x
   x = 1,789,797,636/19,939
6. Step 6: Final answer
   x = 89,763.66