Finding the Third Proportional to 158,720 and 245,656

Step by Step Solution

1. Step 1: Write the proportion equation
   158,720 : 245,656 = 245,656 : x
2. Step 2: Convert to fraction form
   158,720/245,656 = 245,656/x
3. Step 3: Cross multiply
   158,720x = 245,656 × 245,656
4. Step 4: Simplify right side
   158,720x = 60,346,870,336
5. Step 5: Solve for x
   x = 60,346,870,336/158,720
6. Step 6: Final answer
   x = 380,209.62