Finding the Third Proportional to 143,096 and 310,780

Step by Step Solution

1. Step 1: Write the proportion equation
   143,096 : 310,780 = 310,780 : x
2. Step 2: Convert to fraction form
   143,096/310,780 = 310,780/x
3. Step 3: Cross multiply
   143,096x = 310,780 × 310,780
4. Step 4: Simplify right side
   143,096x = 96,584,208,400
5. Step 5: Solve for x
   x = 96,584,208,400/143,096
6. Step 6: Final answer
   x = 674,960.92