Finding the Third Proportional to 142,530 and 309,348

Step by Step Solution

1. Step 1: Write the proportion equation
   142,530 : 309,348 = 309,348 : x
2. Step 2: Convert to fraction form
   142,530/309,348 = 309,348/x
3. Step 3: Cross multiply
   142,530x = 309,348 × 309,348
4. Step 4: Simplify right side
   142,530x = 95,696,185,104
5. Step 5: Solve for x
   x = 95,696,185,104/142,530
6. Step 6: Final answer
   x = 671,410.83