Finding the Third Proportional to 19,631 and 42,421

Step by Step Solution

1. Step 1: Write the proportion equation
   19,631 : 42,421 = 42,421 : x
2. Step 2: Convert to fraction form
   19,631/42,421 = 42,421/x
3. Step 3: Cross multiply
   19,631x = 42,421 × 42,421
4. Step 4: Simplify right side
   19,631x = 1,799,541,241
5. Step 5: Solve for x
   x = 1,799,541,241/19,631
6. Step 6: Final answer
   x = 91,668.34