Finding the Third Proportional to 250,789.50 and 388,759.50

Step by Step Solution

1. Step 1: Write the proportion equation
   250,789.50 : 388,759.50 = 388,759.50 : x
2. Step 2: Convert to fraction form
   250,789.50/388,759.50 = 388,759.50/x
3. Step 3: Cross multiply
   250,789.50x = 388,759.50 × 388,759.50
4. Step 4: Simplify right side
   250,789.50x = 151,133,948,840.25
5. Step 5: Solve for x
   x = 151,133,948,840.25/250,789.50
6. Step 6: Final answer
   x = 602,632.68