Finding the Fourth Proportional to 139,175.82, 192,062.61 and 78,745.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,175.82 : 192,062.61 = 78,745.10 : x
2. Step 2: Convert to fraction form
   139,175.82/192,062.61 = 78,745.10/x
3. Step 3: Cross multiply
   139,175.82x = 192,062.61 × 78,745.10
4. Step 4: Simplify right side
   139,175.82x = 15,123,988,470.40
5. Step 5: Solve for x
   x = 15,123,988,470.40/139,175.82
6. Step 6: Final answer
   x = 108,668.22