Finding the Third Proportional to 142,240.50 and 302,584.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,240.50 : 302,584.50 = 302,584.50 : x
2. Step 2: Convert to fraction form
   142,240.50/302,584.50 = 302,584.50/x
3. Step 3: Cross multiply
   142,240.50x = 302,584.50 × 302,584.50
4. Step 4: Simplify right side
   142,240.50x = 91,557,379,640.25
5. Step 5: Solve for x
   x = 91,557,379,640.25/142,240.50
6. Step 6: Final answer
   x = 643,680.10