Finding the Fourth Proportional to 428,870.67, 591,837.25 and 237,879.15

Step by Step Solution

1. Step 1: Write the proportion equation
   428,870.67 : 591,837.25 = 237,879.15 : x
2. Step 2: Convert to fraction form
   428,870.67/591,837.25 = 237,879.15/x
3. Step 3: Cross multiply
   428,870.67x = 591,837.25 × 237,879.15
4. Step 4: Simplify right side
   428,870.67x = 140,785,741,968.34
5. Step 5: Solve for x
   x = 140,785,741,968.34/428,870.67
6. Step 6: Final answer
   x = 328,270.86