Finding the Third Proportional to 187,456 and 404,438

Step by Step Solution

1. Step 1: Write the proportion equation
   187,456 : 404,438 = 404,438 : x
2. Step 2: Convert to fraction form
   187,456/404,438 = 404,438/x
3. Step 3: Cross multiply
   187,456x = 404,438 × 404,438
4. Step 4: Simplify right side
   187,456x = 163,570,095,844
5. Step 5: Solve for x
   x = 163,570,095,844/187,456
6. Step 6: Final answer
   x = 872,578.61