Finding the Third Proportional to 143,768 and 311,970

Step by Step Solution

1. Step 1: Write the proportion equation
   143,768 : 311,970 = 311,970 : x
2. Step 2: Convert to fraction form
   143,768/311,970 = 311,970/x
3. Step 3: Cross multiply
   143,768x = 311,970 × 311,970
4. Step 4: Simplify right side
   143,768x = 97,325,280,900
5. Step 5: Solve for x
   x = 97,325,280,900/143,768
6. Step 6: Final answer
   x = 676,960.67