Finding the Fourth Proportional to 383,667.81, 575,667.54 and 205,967.31

Step by Step Solution

1. Step 1: Write the proportion equation
   383,667.81 : 575,667.54 = 205,967.31 : x
2. Step 2: Convert to fraction form
   383,667.81/575,667.54 = 205,967.31/x
3. Step 3: Cross multiply
   383,667.81x = 575,667.54 × 205,967.31
4. Step 4: Simplify right side
   383,667.81x = 118,568,694,668.12
5. Step 5: Solve for x
   x = 118,568,694,668.12/383,667.81
6. Step 6: Final answer
   x = 309,039.99