Finding the Fourth Proportional to 139,175.98, 192,062.82 and 78,745.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,175.98 : 192,062.82 = 78,745.42 : x
2. Step 2: Convert to fraction form
   139,175.98/192,062.82 = 78,745.42/x
3. Step 3: Cross multiply
   139,175.98x = 192,062.82 × 78,745.42
4. Step 4: Simplify right side
   139,175.98x = 15,124,067,427.28
5. Step 5: Solve for x
   x = 15,124,067,427.28/139,175.98
6. Step 6: Final answer
   x = 108,668.66