Finding the Fourth Proportional to 139,235.73, 192,143.25 and 78,817.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139,235.73 : 192,143.25 = 78,817.83 : x
2. Step 2: Convert to fraction form
   139,235.73/192,143.25 = 78,817.83/x
3. Step 3: Cross multiply
   139,235.73x = 192,143.25 × 78,817.83
4. Step 4: Simplify right side
   139,235.73x = 15,144,314,014.15
5. Step 5: Solve for x
   x = 15,144,314,014.15/139,235.73
6. Step 6: Final answer
   x = 108,767.44