Finding the Third Proportional to 242,272.69 and 355,915.69

Step by Step Solution

1. Step 1: Write the proportion equation
   242,272.69 : 355,915.69 = 355,915.69 : x
2. Step 2: Convert to fraction form
   242,272.69/355,915.69 = 355,915.69/x
3. Step 3: Cross multiply
   242,272.69x = 355,915.69 × 355,915.69
4. Step 4: Simplify right side
   242,272.69x = 126,675,976,608.60
5. Step 5: Solve for x
   x = 126,675,976,608.60/242,272.69
6. Step 6: Final answer
   x = 522,865.28