Finding the Third Proportional to 171,466 and 262,139

Step by Step Solution

1. Step 1: Write the proportion equation
   171,466 : 262,139 = 262,139 : x
2. Step 2: Convert to fraction form
   171,466/262,139 = 262,139/x
3. Step 3: Cross multiply
   171,466x = 262,139 × 262,139
4. Step 4: Simplify right side
   171,466x = 68,716,855,321
5. Step 5: Solve for x
   x = 68,716,855,321/171,466
6. Step 6: Final answer
   x = 400,760.82