Finding the Third Proportional to 188,048 and 391,648

Step by Step Solution

1. Step 1: Write the proportion equation
   188,048 : 391,648 = 391,648 : x
2. Step 2: Convert to fraction form
   188,048/391,648 = 391,648/x
3. Step 3: Cross multiply
   188,048x = 391,648 × 391,648
4. Step 4: Simplify right side
   188,048x = 153,388,155,904
5. Step 5: Solve for x
   x = 153,388,155,904/188,048
6. Step 6: Final answer
   x = 815,686.19