Finding the Third Proportional to 188,505 and 398,826

Step by Step Solution

1. Step 1: Write the proportion equation
   188,505 : 398,826 = 398,826 : x
2. Step 2: Convert to fraction form
   188,505/398,826 = 398,826/x
3. Step 3: Cross multiply
   188,505x = 398,826 × 398,826
4. Step 4: Simplify right side
   188,505x = 159,062,178,276
5. Step 5: Solve for x
   x = 159,062,178,276/188,505
6. Step 6: Final answer
   x = 843,808.80