Finding the Fourth Proportional to 142,076.22, 196,064.79 and 78,413.57

Step by Step Solution

1. Step 1: Write the proportion equation
   142,076.22 : 196,064.79 = 78,413.57 : x
2. Step 2: Convert to fraction form
   142,076.22/196,064.79 = 78,413.57/x
3. Step 3: Cross multiply
   142,076.22x = 196,064.79 × 78,413.57
4. Step 4: Simplify right side
   142,076.22x = 15,374,138,762.81
5. Step 5: Solve for x
   x = 15,374,138,762.81/142,076.22
6. Step 6: Final answer
   x = 108,210.50