Finding the Third Proportional to 142,818 and 301,540

Step by Step Solution

1. Step 1: Write the proportion equation
   142,818 : 301,540 = 301,540 : x
2. Step 2: Convert to fraction form
   142,818/301,540 = 301,540/x
3. Step 3: Cross multiply
   142,818x = 301,540 × 301,540
4. Step 4: Simplify right side
   142,818x = 90,926,371,600
5. Step 5: Solve for x
   x = 90,926,371,600/142,818
6. Step 6: Final answer
   x = 636,659.05