Finding the Third Proportional to 19,945 and 42,530

Step by Step Solution

1. Step 1: Write the proportion equation
   19,945 : 42,530 = 42,530 : x
2. Step 2: Convert to fraction form
   19,945/42,530 = 42,530/x
3. Step 3: Cross multiply
   19,945x = 42,530 × 42,530
4. Step 4: Simplify right side
   19,945x = 1,808,800,900
5. Step 5: Solve for x
   x = 1,808,800,900/19,945
6. Step 6: Final answer
   x = 90,689.44