Finding the Third Proportional to 143,168 and 314,656

Step by Step Solution

1. Step 1: Write the proportion equation
   143,168 : 314,656 = 314,656 : x
2. Step 2: Convert to fraction form
   143,168/314,656 = 314,656/x
3. Step 3: Cross multiply
   143,168x = 314,656 × 314,656
4. Step 4: Simplify right side
   143,168x = 99,008,398,336
5. Step 5: Solve for x
   x = 99,008,398,336/143,168
6. Step 6: Final answer
   x = 691,553.97