Finding the Fourth Proportional to 139,429.12, 192,413.04 and 75,766.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,429.12 : 192,413.04 = 75,766.72 : x
2. Step 2: Convert to fraction form
   139,429.12/192,413.04 = 75,766.72/x
3. Step 3: Cross multiply
   139,429.12x = 192,413.04 × 75,766.72
4. Step 4: Simplify right side
   139,429.12x = 14,578,504,926.03
5. Step 5: Solve for x
   x = 14,578,504,926.03/139,429.12
6. Step 6: Final answer
   x = 104,558.54