Finding the Third Proportional to 143,986.50 and 213,144

Step by Step Solution

1. Step 1: Write the proportion equation
   143,986.50 : 213,144 = 213,144 : x
2. Step 2: Convert to fraction form
   143,986.50/213,144 = 213,144/x
3. Step 3: Cross multiply
   143,986.50x = 213,144 × 213,144
4. Step 4: Simplify right side
   143,986.50x = 45,430,364,736
5. Step 5: Solve for x
   x = 45,430,364,736/143,986.50
6. Step 6: Final answer
   x = 315,518.22