Finding the Fourth Proportional to 56,821.06, 78,413.61 and 31,328.34

Step by Step Solution

1. Step 1: Write the proportion equation
   56,821.06 : 78,413.61 = 31,328.34 : x
2. Step 2: Convert to fraction form
   56,821.06/78,413.61 = 31,328.34/x
3. Step 3: Cross multiply
   56,821.06x = 78,413.61 × 31,328.34
4. Step 4: Simplify right side
   56,821.06x = 2,456,568,234.71
5. Step 5: Solve for x
   x = 2,456,568,234.71/56,821.06
6. Step 6: Final answer
   x = 43,233.41