Finding the Third Proportional to 172,680 and 374,172

Step by Step Solution

1. Step 1: Write the proportion equation
   172,680 : 374,172 = 374,172 : x
2. Step 2: Convert to fraction form
   172,680/374,172 = 374,172/x
3. Step 3: Cross multiply
   172,680x = 374,172 × 374,172
4. Step 4: Simplify right side
   172,680x = 140,004,685,584
5. Step 5: Solve for x
   x = 140,004,685,584/172,680
6. Step 6: Final answer
   x = 810,775.34