Finding the Fourth Proportional to 139,229.88, 192,091.50 and 78,794.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,229.88 : 192,091.50 = 78,794.52 : x
2. Step 2: Convert to fraction form
   139,229.88/192,091.50 = 78,794.52/x
3. Step 3: Cross multiply
   139,229.88x = 192,091.50 × 78,794.52
4. Step 4: Simplify right side
   139,229.88x = 15,135,757,538.58
5. Step 5: Solve for x
   x = 15,135,757,538.58/139,229.88
6. Step 6: Final answer
   x = 108,710.56