Finding the Third Proportional to 171,912 and 262,809

Step by Step Solution

1. Step 1: Write the proportion equation
   171,912 : 262,809 = 262,809 : x
2. Step 2: Convert to fraction form
   171,912/262,809 = 262,809/x
3. Step 3: Cross multiply
   171,912x = 262,809 × 262,809
4. Step 4: Simplify right side
   171,912x = 69,068,570,481
5. Step 5: Solve for x
   x = 69,068,570,481/171,912
6. Step 6: Final answer
   x = 401,767.01