Finding the Third Proportional to 87,826 and 188,990

Step by Step Solution

1. Step 1: Write the proportion equation
   87,826 : 188,990 = 188,990 : x
2. Step 2: Convert to fraction form
   87,826/188,990 = 188,990/x
3. Step 3: Cross multiply
   87,826x = 188,990 × 188,990
4. Step 4: Simplify right side
   87,826x = 35,717,220,100
5. Step 5: Solve for x
   x = 35,717,220,100/87,826
6. Step 6: Final answer
   x = 406,681.62