Finding the Third Proportional to 142,639 and 301,196

Step by Step Solution

1. Step 1: Write the proportion equation
   142,639 : 301,196 = 301,196 : x
2. Step 2: Convert to fraction form
   142,639/301,196 = 301,196/x
3. Step 3: Cross multiply
   142,639x = 301,196 × 301,196
4. Step 4: Simplify right side
   142,639x = 90,719,030,416
5. Step 5: Solve for x
   x = 90,719,030,416/142,639
6. Step 6: Final answer
   x = 636,004.39