Finding the Fourth Proportional to 271,215.89, 406,674.80 and 215,413.37

Step by Step Solution

1. Step 1: Write the proportion equation
   271,215.89 : 406,674.80 = 215,413.37 : x
2. Step 2: Convert to fraction form
   271,215.89/406,674.80 = 215,413.37/x
3. Step 3: Cross multiply
   271,215.89x = 406,674.80 × 215,413.37
4. Step 4: Simplify right side
   271,215.89x = 87,603,188,085.01
5. Step 5: Solve for x
   x = 87,603,188,085.01/271,215.89
6. Step 6: Final answer
   x = 323,001.68