Finding the Fourth Proportional to 112,413.96, 155,153.04 and 72,178.56

Step by Step Solution

1. Step 1: Write the proportion equation
   112,413.96 : 155,153.04 = 72,178.56 : x
2. Step 2: Convert to fraction form
   112,413.96/155,153.04 = 72,178.56/x
3. Step 3: Cross multiply
   112,413.96x = 155,153.04 × 72,178.56
4. Step 4: Simplify right side
   112,413.96x = 11,198,723,006.82
5. Step 5: Solve for x
   x = 11,198,723,006.82/112,413.96
6. Step 6: Final answer
   x = 99,620.39