Finding the Third Proportional to 186,640 and 404,384

Step by Step Solution

1. Step 1: Write the proportion equation
   186,640 : 404,384 = 404,384 : x
2. Step 2: Convert to fraction form
   186,640/404,384 = 404,384/x
3. Step 3: Cross multiply
   186,640x = 404,384 × 404,384
4. Step 4: Simplify right side
   186,640x = 163,526,419,456
5. Step 5: Solve for x
   x = 163,526,419,456/186,640
6. Step 6: Final answer
   x = 876,159.56