Finding the Third Proportional to 323,338 and 680,172

Step by Step Solution

1. Step 1: Write the proportion equation
   323,338 : 680,172 = 680,172 : x
2. Step 2: Convert to fraction form
   323,338/680,172 = 680,172/x
3. Step 3: Cross multiply
   323,338x = 680,172 × 680,172
4. Step 4: Simplify right side
   323,338x = 462,633,949,584
5. Step 5: Solve for x
   x = 462,633,949,584/323,338
6. Step 6: Final answer
   x = 1,430,806.00