Finding the Fourth Proportional to 139,424.76, 192,390.54 and 78,982.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139,424.76 : 192,390.54 = 78,982.46 : x
2. Step 2: Convert to fraction form
   139,424.76/192,390.54 = 78,982.46/x
3. Step 3: Cross multiply
   139,424.76x = 192,390.54 × 78,982.46
4. Step 4: Simplify right side
   139,424.76x = 15,195,477,167.98
5. Step 5: Solve for x
   x = 15,195,477,167.98/139,424.76
6. Step 6: Final answer
   x = 108,986.93