Finding the Third Proportional to 20,349 and 42,257

Step by Step Solution

1. Step 1: Write the proportion equation
   20,349 : 42,257 = 42,257 : x
2. Step 2: Convert to fraction form
   20,349/42,257 = 42,257/x
3. Step 3: Cross multiply
   20,349x = 42,257 × 42,257
4. Step 4: Simplify right side
   20,349x = 1,785,654,049
5. Step 5: Solve for x
   x = 1,785,654,049/20,349
6. Step 6: Final answer
   x = 87,751.44