Finding the Fourth Proportional to 81,234.72, 112,116.60 and 49,413.60

Step by Step Solution

1. Step 1: Write the proportion equation
   81,234.72 : 112,116.60 = 49,413.60 : x
2. Step 2: Convert to fraction form
   81,234.72/112,116.60 = 49,413.60/x
3. Step 3: Cross multiply
   81,234.72x = 112,116.60 × 49,413.60
4. Step 4: Simplify right side
   81,234.72x = 5,540,084,825.76
5. Step 5: Solve for x
   x = 5,540,084,825.76/81,234.72
6. Step 6: Final answer
   x = 68,198.48