Finding the Third Proportional to 323,636 and 688,096

Step by Step Solution

1. Step 1: Write the proportion equation
   323,636 : 688,096 = 688,096 : x
2. Step 2: Convert to fraction form
   323,636/688,096 = 688,096/x
3. Step 3: Cross multiply
   323,636x = 688,096 × 688,096
4. Step 4: Simplify right side
   323,636x = 473,476,105,216
5. Step 5: Solve for x
   x = 473,476,105,216/323,636
6. Step 6: Final answer
   x = 1,462,989.61