Finding the Third Proportional to 172,147 and 372,880

Step by Step Solution

1. Step 1: Write the proportion equation
   172,147 : 372,880 = 372,880 : x
2. Step 2: Convert to fraction form
   172,147/372,880 = 372,880/x
3. Step 3: Cross multiply
   172,147x = 372,880 × 372,880
4. Step 4: Simplify right side
   172,147x = 139,039,494,400
5. Step 5: Solve for x
   x = 139,039,494,400/172,147
6. Step 6: Final answer
   x = 807,678.87