Finding the Third Proportional to 162,687 and 342,870

Step by Step Solution

1. Step 1: Write the proportion equation
   162,687 : 342,870 = 342,870 : x
2. Step 2: Convert to fraction form
   162,687/342,870 = 342,870/x
3. Step 3: Cross multiply
   162,687x = 342,870 × 342,870
4. Step 4: Simplify right side
   162,687x = 117,559,836,900
5. Step 5: Solve for x
   x = 117,559,836,900/162,687
6. Step 6: Final answer
   x = 722,613.59