Finding the Third Proportional to 145,438 and 308,456

Step by Step Solution

1. Step 1: Write the proportion equation
   145,438 : 308,456 = 308,456 : x
2. Step 2: Convert to fraction form
   145,438/308,456 = 308,456/x
3. Step 3: Cross multiply
   145,438x = 308,456 × 308,456
4. Step 4: Simplify right side
   145,438x = 95,145,103,936
5. Step 5: Solve for x
   x = 95,145,103,936/145,438
6. Step 6: Final answer
   x = 654,197.00