Finding the Third Proportional to 65,621 and 143,271

Step by Step Solution

1. Step 1: Write the proportion equation
   65,621 : 143,271 = 143,271 : x
2. Step 2: Convert to fraction form
   65,621/143,271 = 143,271/x
3. Step 3: Cross multiply
   65,621x = 143,271 × 143,271
4. Step 4: Simplify right side
   65,621x = 20,526,579,441
5. Step 5: Solve for x
   x = 20,526,579,441/65,621
6. Step 6: Final answer
   x = 312,805.04