Finding the Fourth Proportional to 271,760.33, 405,810.51 and 221,939.33

Step by Step Solution

1. Step 1: Write the proportion equation
   271,760.33 : 405,810.51 = 221,939.33 : x
2. Step 2: Convert to fraction form
   271,760.33/405,810.51 = 221,939.33/x
3. Step 3: Cross multiply
   271,760.33x = 405,810.51 × 221,939.33
4. Step 4: Simplify right side
   271,760.33x = 90,065,310,667.31
5. Step 5: Solve for x
   x = 90,065,310,667.31/271,760.33
6. Step 6: Final answer
   x = 331,414.49