Finding the Third Proportional to 172,908 and 259,362

Step by Step Solution

1. Step 1: Write the proportion equation
   172,908 : 259,362 = 259,362 : x
2. Step 2: Convert to fraction form
   172,908/259,362 = 259,362/x
3. Step 3: Cross multiply
   172,908x = 259,362 × 259,362
4. Step 4: Simplify right side
   172,908x = 67,268,647,044
5. Step 5: Solve for x
   x = 67,268,647,044/172,908
6. Step 6: Final answer
   x = 389,043