Finding the Third Proportional to 171,918 and 262,818

Step by Step Solution

1. Step 1: Write the proportion equation
   171,918 : 262,818 = 262,818 : x
2. Step 2: Convert to fraction form
   171,918/262,818 = 262,818/x
3. Step 3: Cross multiply
   171,918x = 262,818 × 262,818
4. Step 4: Simplify right side
   171,918x = 69,073,301,124
5. Step 5: Solve for x
   x = 69,073,301,124/171,918
6. Step 6: Final answer
   x = 401,780.51