Finding the Third Proportional to 248,757 and 394,527.50

Step by Step Solution

1. Step 1: Write the proportion equation
   248,757 : 394,527.50 = 394,527.50 : x
2. Step 2: Convert to fraction form
   248,757/394,527.50 = 394,527.50/x
3. Step 3: Cross multiply
   248,757x = 394,527.50 × 394,527.50
4. Step 4: Simplify right side
   248,757x = 155,651,948,256.25
5. Step 5: Solve for x
   x = 155,651,948,256.25/248,757
6. Step 6: Final answer
   x = 625,718.87