Finding the Third Proportional to 65,655 and 143,189

Step by Step Solution

1. Step 1: Write the proportion equation
   65,655 : 143,189 = 143,189 : x
2. Step 2: Convert to fraction form
   65,655/143,189 = 143,189/x
3. Step 3: Cross multiply
   65,655x = 143,189 × 143,189
4. Step 4: Simplify right side
   65,655x = 20,503,089,721
5. Step 5: Solve for x
   x = 20,503,089,721/65,655
6. Step 6: Final answer
   x = 312,285.27