Finding the Fourth Proportional to 31,413.15, 47,123.82 and 10,355.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,413.15 : 47,123.82 = 10,355.37 : x
2. Step 2: Convert to fraction form
   31,413.15/47,123.82 = 10,355.37/x
3. Step 3: Cross multiply
   31,413.15x = 47,123.82 × 10,355.37
4. Step 4: Simplify right side
   31,413.15x = 487,984,591.91
5. Step 5: Solve for x
   x = 487,984,591.91/31,413.15
6. Step 6: Final answer
   x = 15,534.40