Finding the Third Proportional to 163,306 and 333,172

Step by Step Solution

1. Step 1: Write the proportion equation
   163,306 : 333,172 = 333,172 : x
2. Step 2: Convert to fraction form
   163,306/333,172 = 333,172/x
3. Step 3: Cross multiply
   163,306x = 333,172 × 333,172
4. Step 4: Simplify right side
   163,306x = 111,003,581,584
5. Step 5: Solve for x
   x = 111,003,581,584/163,306
6. Step 6: Final answer
   x = 679,727.52