Finding the Fourth Proportional to 383,131.72, 528,717 and 211,046.14

Step by Step Solution

1. Step 1: Write the proportion equation
   383,131.72 : 528,717 = 211,046.14 : x
2. Step 2: Convert to fraction form
   383,131.72/528,717 = 211,046.14/x
3. Step 3: Cross multiply
   383,131.72x = 528,717 × 211,046.14
4. Step 4: Simplify right side
   383,131.72x = 111,583,682,002.38
5. Step 5: Solve for x
   x = 111,583,682,002.38/383,131.72
6. Step 6: Final answer
   x = 291,241.04