Finding the Third Proportional to 20,474 and 42,404

Step by Step Solution

1. Step 1: Write the proportion equation
   20,474 : 42,404 = 42,404 : x
2. Step 2: Convert to fraction form
   20,474/42,404 = 42,404/x
3. Step 3: Cross multiply
   20,474x = 42,404 × 42,404
4. Step 4: Simplify right side
   20,474x = 1,798,099,216
5. Step 5: Solve for x
   x = 1,798,099,216/20,474
6. Step 6: Final answer
   x = 87,823.54