Finding the Fourth Proportional to 78,413.78, 108,153.81 and 49,742.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,413.78 : 108,153.81 = 49,742.18 : x
2. Step 2: Convert to fraction form
   78,413.78/108,153.81 = 49,742.18/x
3. Step 3: Cross multiply
   78,413.78x = 108,153.81 × 49,742.18
4. Step 4: Simplify right side
   78,413.78x = 5,379,806,284.71
5. Step 5: Solve for x
   x = 5,379,806,284.71/78,413.78
6. Step 6: Final answer
   x = 68,607.92