Finding the Third Proportional to 142,436 and 211,458

Step by Step Solution

1. Step 1: Write the proportion equation
   142,436 : 211,458 = 211,458 : x
2. Step 2: Convert to fraction form
   142,436/211,458 = 211,458/x
3. Step 3: Cross multiply
   142,436x = 211,458 × 211,458
4. Step 4: Simplify right side
   142,436x = 44,714,485,764
5. Step 5: Solve for x
   x = 44,714,485,764/142,436
6. Step 6: Final answer
   x = 313,926.86