Finding the Fourth Proportional to 139,851, 192,987.63 and 79,413.66

Step by Step Solution

1. Step 1: Write the proportion equation
   139,851 : 192,987.63 = 79,413.66 : x
2. Step 2: Convert to fraction form
   139,851/192,987.63 = 79,413.66/x
3. Step 3: Cross multiply
   139,851x = 192,987.63 × 79,413.66
4. Step 4: Simplify right side
   139,851x = 15,325,854,033.03
5. Step 5: Solve for x
   x = 15,325,854,033.03/139,851
6. Step 6: Final answer
   x = 109,587.02