Finding the Third Proportional to 143,208 and 311,010

Step by Step Solution

1. Step 1: Write the proportion equation
   143,208 : 311,010 = 311,010 : x
2. Step 2: Convert to fraction form
   143,208/311,010 = 311,010/x
3. Step 3: Cross multiply
   143,208x = 311,010 × 311,010
4. Step 4: Simplify right side
   143,208x = 96,727,220,100
5. Step 5: Solve for x
   x = 96,727,220,100/143,208
6. Step 6: Final answer
   x = 675,431.68