Finding the Fourth Proportional to 685,667.69, 1,029,164.92 and 330,931.43

Step by Step Solution

1. Step 1: Write the proportion equation
   685,667.69 : 1,029,164.92 = 330,931.43 : x
2. Step 2: Convert to fraction form
   685,667.69/1,029,164.92 = 330,931.43/x
3. Step 3: Cross multiply
   685,667.69x = 1,029,164.92 × 330,931.43
4. Step 4: Simplify right side
   685,667.69x = 340,583,012,708.28
5. Step 5: Solve for x
   x = 340,583,012,708.28/685,667.69
6. Step 6: Final answer
   x = 496,717.32