Finding the Third Proportional to 143,233.50 and 312,144

Step by Step Solution

1. Step 1: Write the proportion equation
   143,233.50 : 312,144 = 312,144 : x
2. Step 2: Convert to fraction form
   143,233.50/312,144 = 312,144/x
3. Step 3: Cross multiply
   143,233.50x = 312,144 × 312,144
4. Step 4: Simplify right side
   143,233.50x = 97,433,876,736
5. Step 5: Solve for x
   x = 97,433,876,736/143,233.50
6. Step 6: Final answer
   x = 680,245.03