Finding the Third Proportional to 128,770.50 and 282,144

Step by Step Solution

1. Step 1: Write the proportion equation
   128,770.50 : 282,144 = 282,144 : x
2. Step 2: Convert to fraction form
   128,770.50/282,144 = 282,144/x
3. Step 3: Cross multiply
   128,770.50x = 282,144 × 282,144
4. Step 4: Simplify right side
   128,770.50x = 79,605,236,736
5. Step 5: Solve for x
   x = 79,605,236,736/128,770.50
6. Step 6: Final answer
   x = 618,194.67