Finding the Fourth Proportional to 269,859.98, 404,160.24 and 213,320.54

Step by Step Solution

1. Step 1: Write the proportion equation
   269,859.98 : 404,160.24 = 213,320.54 : x
2. Step 2: Convert to fraction form
   269,859.98/404,160.24 = 213,320.54/x
3. Step 3: Cross multiply
   269,859.98x = 404,160.24 × 213,320.54
4. Step 4: Simplify right side
   269,859.98x = 86,215,680,643.33
5. Step 5: Solve for x
   x = 86,215,680,643.33/269,859.98
6. Step 6: Final answer
   x = 319,483.02