Finding the Fourth Proportional to 431,870.50, 595,979.60 and 238,290.26

Step by Step Solution

1. Step 1: Write the proportion equation
   431,870.50 : 595,979.60 = 238,290.26 : x
2. Step 2: Convert to fraction form
   431,870.50/595,979.60 = 238,290.26/x
3. Step 3: Cross multiply
   431,870.50x = 595,979.60 × 238,290.26
4. Step 4: Simplify right side
   431,870.50x = 142,016,131,454.52
5. Step 5: Solve for x
   x = 142,016,131,454.52/431,870.50
6. Step 6: Final answer
   x = 328,839.62