Finding the Fourth Proportional to 685,667.31, 1,029,164.36 and 330,931.05

Step by Step Solution

1. Step 1: Write the proportion equation
   685,667.31 : 1,029,164.36 = 330,931.05 : x
2. Step 2: Convert to fraction form
   685,667.31/1,029,164.36 = 330,931.05/x
3. Step 3: Cross multiply
   685,667.31x = 1,029,164.36 × 330,931.05
4. Step 4: Simplify right side
   685,667.31x = 340,582,440,622.72
5. Step 5: Solve for x
   x = 340,582,440,622.72/685,667.31
6. Step 6: Final answer
   x = 496,716.75