Finding the Third Proportional to 190,990 and 404,746.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,990 : 404,746.50 = 404,746.50 : x
2. Step 2: Convert to fraction form
   190,990/404,746.50 = 404,746.50/x
3. Step 3: Cross multiply
   190,990x = 404,746.50 × 404,746.50
4. Step 4: Simplify right side
   190,990x = 163,819,729,262.25
5. Step 5: Solve for x
   x = 163,819,729,262.25/190,990
6. Step 6: Final answer
   x = 857,739.83