Finding the Third Proportional to 78,280.50 and 171,330

Step by Step Solution

1. Step 1: Write the proportion equation
   78,280.50 : 171,330 = 171,330 : x
2. Step 2: Convert to fraction form
   78,280.50/171,330 = 171,330/x
3. Step 3: Cross multiply
   78,280.50x = 171,330 × 171,330
4. Step 4: Simplify right side
   78,280.50x = 29,353,968,900
5. Step 5: Solve for x
   x = 29,353,968,900/78,280.50
6. Step 6: Final answer
   x = 374,984.43