Finding the Third Proportional to 19,638 and 42,930

Step by Step Solution

1. Step 1: Write the proportion equation
   19,638 : 42,930 = 42,930 : x
2. Step 2: Convert to fraction form
   19,638/42,930 = 42,930/x
3. Step 3: Cross multiply
   19,638x = 42,930 × 42,930
4. Step 4: Simplify right side
   19,638x = 1,842,984,900
5. Step 5: Solve for x
   x = 1,842,984,900/19,638
6. Step 6: Final answer
   x = 93,847.89