Finding the Third Proportional to 143,099.50 and 310,801

Step by Step Solution

1. Step 1: Write the proportion equation
   143,099.50 : 310,801 = 310,801 : x
2. Step 2: Convert to fraction form
   143,099.50/310,801 = 310,801/x
3. Step 3: Cross multiply
   143,099.50x = 310,801 × 310,801
4. Step 4: Simplify right side
   143,099.50x = 96,597,261,601
5. Step 5: Solve for x
   x = 96,597,261,601/143,099.50
6. Step 6: Final answer
   x = 675,035.63