Finding the Third Proportional to 255,362 and 404,160

Step by Step Solution

1. Step 1: Write the proportion equation
   255,362 : 404,160 = 404,160 : x
2. Step 2: Convert to fraction form
   255,362/404,160 = 404,160/x
3. Step 3: Cross multiply
   255,362x = 404,160 × 404,160
4. Step 4: Simplify right side
   255,362x = 163,345,305,600
5. Step 5: Solve for x
   x = 163,345,305,600/255,362
6. Step 6: Final answer
   x = 639,661.76