Finding the Fourth Proportional to 139,141.59, 192,015.39 and 78,710.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,141.59 : 192,015.39 = 78,710.94 : x
2. Step 2: Convert to fraction form
   139,141.59/192,015.39 = 78,710.94/x
3. Step 3: Cross multiply
   139,141.59x = 192,015.39 × 78,710.94
4. Step 4: Simplify right side
   139,141.59x = 15,113,711,841.37
5. Step 5: Solve for x
   x = 15,113,711,841.37/139,141.59
6. Step 6: Final answer
   x = 108,621.09