Finding the Fourth Proportional to 37,028.75, 55,413.95 and 30,287.31

Step by Step Solution

1. Step 1: Write the proportion equation
   37,028.75 : 55,413.95 = 30,287.31 : x
2. Step 2: Convert to fraction form
   37,028.75/55,413.95 = 30,287.31/x
3. Step 3: Cross multiply
   37,028.75x = 55,413.95 × 30,287.31
4. Step 4: Simplify right side
   37,028.75x = 1,678,339,330.54
5. Step 5: Solve for x
   x = 1,678,339,330.54/37,028.75
6. Step 6: Final answer
   x = 45,325.31