Finding the Fourth Proportional to 71,413.31, 98,553.60 and 40,789.09

Step by Step Solution

1. Step 1: Write the proportion equation
   71,413.31 : 98,553.60 = 40,789.09 : x
2. Step 2: Convert to fraction form
   71,413.31/98,553.60 = 40,789.09/x
3. Step 3: Cross multiply
   71,413.31x = 98,553.60 × 40,789.09
4. Step 4: Simplify right side
   71,413.31x = 4,019,911,660.22
5. Step 5: Solve for x
   x = 4,019,911,660.22/71,413.31
6. Step 6: Final answer
   x = 56,290.79