Finding the Third Proportional to 190,990 and 404,748

Step by Step Solution

1. Step 1: Write the proportion equation
   190,990 : 404,748 = 404,748 : x
2. Step 2: Convert to fraction form
   190,990/404,748 = 404,748/x
3. Step 3: Cross multiply
   190,990x = 404,748 × 404,748
4. Step 4: Simplify right side
   190,990x = 163,820,943,504
5. Step 5: Solve for x
   x = 163,820,943,504/190,990
6. Step 6: Final answer
   x = 857,746.18