Finding the Third Proportional to 142,680 and 220,808

Step by Step Solution

1. Step 1: Write the proportion equation
   142,680 : 220,808 = 220,808 : x
2. Step 2: Convert to fraction form
   142,680/220,808 = 220,808/x
3. Step 3: Cross multiply
   142,680x = 220,808 × 220,808
4. Step 4: Simplify right side
   142,680x = 48,756,172,864
5. Step 5: Solve for x
   x = 48,756,172,864/142,680
6. Step 6: Final answer
   x = 341,716.94