Finding the Fourth Proportional to 389,131.52, 581,918.52 and 282,872.48

Step by Step Solution

1. Step 1: Write the proportion equation
   389,131.52 : 581,918.52 = 282,872.48 : x
2. Step 2: Convert to fraction form
   389,131.52/581,918.52 = 282,872.48/x
3. Step 3: Cross multiply
   389,131.52x = 581,918.52 × 282,872.48
4. Step 4: Simplify right side
   389,131.52x = 164,608,734,910.33
5. Step 5: Solve for x
   x = 164,608,734,910.33/389,131.52
6. Step 6: Final answer
   x = 423,015.68