Finding the Third Proportional to 65,486 and 143,716

Step by Step Solution

1. Step 1: Write the proportion equation
   65,486 : 143,716 = 143,716 : x
2. Step 2: Convert to fraction form
   65,486/143,716 = 143,716/x
3. Step 3: Cross multiply
   65,486x = 143,716 × 143,716
4. Step 4: Simplify right side
   65,486x = 20,654,288,656
5. Step 5: Solve for x
   x = 20,654,288,656/65,486
6. Step 6: Final answer
   x = 315,400.06