Finding the Third Proportional to 143,012 and 214,242

Step by Step Solution

1. Step 1: Write the proportion equation
   143,012 : 214,242 = 214,242 : x
2. Step 2: Convert to fraction form
   143,012/214,242 = 214,242/x
3. Step 3: Cross multiply
   143,012x = 214,242 × 214,242
4. Step 4: Simplify right side
   143,012x = 45,899,634,564
5. Step 5: Solve for x
   x = 45,899,634,564/143,012
6. Step 6: Final answer
   x = 320,949.53