Finding the Third Proportional to 171,238 and 268,612

Step by Step Solution

1. Step 1: Write the proportion equation
   171,238 : 268,612 = 268,612 : x
2. Step 2: Convert to fraction form
   171,238/268,612 = 268,612/x
3. Step 3: Cross multiply
   171,238x = 268,612 × 268,612
4. Step 4: Simplify right side
   171,238x = 72,152,406,544
5. Step 5: Solve for x
   x = 72,152,406,544/171,238
6. Step 6: Final answer
   x = 421,357.45