Finding the Third Proportional to 321,523.17 and 684,667.69

Step by Step Solution

1. Step 1: Write the proportion equation
   321,523.17 : 684,667.69 = 684,667.69 : x
2. Step 2: Convert to fraction form
   321,523.17/684,667.69 = 684,667.69/x
3. Step 3: Cross multiply
   321,523.17x = 684,667.69 × 684,667.69
4. Step 4: Simplify right side
   321,523.17x = 468,769,842,306.60
5. Step 5: Solve for x
   x = 468,769,842,306.60/321,523.17
6. Step 6: Final answer
   x = 1,457,965.97