Finding the Third Proportional to 143,434 and 315,176

Step by Step Solution

1. Step 1: Write the proportion equation
   143,434 : 315,176 = 315,176 : x
2. Step 2: Convert to fraction form
   143,434/315,176 = 315,176/x
3. Step 3: Cross multiply
   143,434x = 315,176 × 315,176
4. Step 4: Simplify right side
   143,434x = 99,335,910,976
5. Step 5: Solve for x
   x = 99,335,910,976/143,434
6. Step 6: Final answer
   x = 692,554.84