Finding the Third Proportional to 143,288 and 311,952

Step by Step Solution

1. Step 1: Write the proportion equation
   143,288 : 311,952 = 311,952 : x
2. Step 2: Convert to fraction form
   143,288/311,952 = 311,952/x
3. Step 3: Cross multiply
   143,288x = 311,952 × 311,952
4. Step 4: Simplify right side
   143,288x = 97,314,050,304
5. Step 5: Solve for x
   x = 97,314,050,304/143,288
6. Step 6: Final answer
   x = 679,150.04