Finding the Third Proportional to 248,607 and 394,276.50

Step by Step Solution

1. Step 1: Write the proportion equation
   248,607 : 394,276.50 = 394,276.50 : x
2. Step 2: Convert to fraction form
   248,607/394,276.50 = 394,276.50/x
3. Step 3: Cross multiply
   248,607x = 394,276.50 × 394,276.50
4. Step 4: Simplify right side
   248,607x = 155,453,958,452.25
5. Step 5: Solve for x
   x = 155,453,958,452.25/248,607
6. Step 6: Final answer
   x = 625,300.01