Finding the Third Proportional to 57,042 and 123,921

Step by Step Solution

1. Step 1: Write the proportion equation
   57,042 : 123,921 = 123,921 : x
2. Step 2: Convert to fraction form
   57,042/123,921 = 123,921/x
3. Step 3: Cross multiply
   57,042x = 123,921 × 123,921
4. Step 4: Simplify right side
   57,042x = 15,356,414,241
5. Step 5: Solve for x
   x = 15,356,414,241/57,042
6. Step 6: Final answer
   x = 269,212.41