Finding the Third Proportional to 155,328 and 245,509

Step by Step Solution

1. Step 1: Write the proportion equation
   155,328 : 245,509 = 245,509 : x
2. Step 2: Convert to fraction form
   155,328/245,509 = 245,509/x
3. Step 3: Cross multiply
   155,328x = 245,509 × 245,509
4. Step 4: Simplify right side
   155,328x = 60,274,669,081
5. Step 5: Solve for x
   x = 60,274,669,081/155,328
6. Step 6: Final answer
   x = 388,047.67