Finding the Fourth Proportional to 431,239.80, 595,111.55 and 240,259.89

Step by Step Solution

1. Step 1: Write the proportion equation
   431,239.80 : 595,111.55 = 240,259.89 : x
2. Step 2: Convert to fraction form
   431,239.80/595,111.55 = 240,259.89/x
3. Step 3: Cross multiply
   431,239.80x = 595,111.55 × 240,259.89
4. Step 4: Simplify right side
   431,239.80x = 142,981,434,339.43
5. Step 5: Solve for x
   x = 142,981,434,339.43/431,239.80
6. Step 6: Final answer
   x = 331,558.99