Finding the Fourth Proportional to 139,380.52, 192,338.95 and 78,949.95

Step by Step Solution

1. Step 1: Write the proportion equation
   139,380.52 : 192,338.95 = 78,949.95 : x
2. Step 2: Convert to fraction form
   139,380.52/192,338.95 = 78,949.95/x
3. Step 3: Cross multiply
   139,380.52x = 192,338.95 × 78,949.95
4. Step 4: Simplify right side
   139,380.52x = 15,185,150,485.55
5. Step 5: Solve for x
   x = 15,185,150,485.55/139,380.52
6. Step 6: Final answer
   x = 108,947.44