Finding the Third Proportional to 171,680 and 355,240

Step by Step Solution

1. Step 1: Write the proportion equation
   171,680 : 355,240 = 355,240 : x
2. Step 2: Convert to fraction form
   171,680/355,240 = 355,240/x
3. Step 3: Cross multiply
   171,680x = 355,240 × 355,240
4. Step 4: Simplify right side
   171,680x = 126,195,457,600
5. Step 5: Solve for x
   x = 126,195,457,600/171,680
6. Step 6: Final answer
   x = 735,062.08