Finding the Third Proportional to 143,144 and 214,860

Step by Step Solution

1. Step 1: Write the proportion equation
   143,144 : 214,860 = 214,860 : x
2. Step 2: Convert to fraction form
   143,144/214,860 = 214,860/x
3. Step 3: Cross multiply
   143,144x = 214,860 × 214,860
4. Step 4: Simplify right side
   143,144x = 46,164,819,600
5. Step 5: Solve for x
   x = 46,164,819,600/143,144
6. Step 6: Final answer
   x = 322,506.14