Finding the Fourth Proportional to 139,510.39, 192,520.32 and 79,086.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,510.39 : 192,520.32 = 79,086.62 : x
2. Step 2: Convert to fraction form
   139,510.39/192,520.32 = 79,086.62/x
3. Step 3: Cross multiply
   139,510.39x = 192,520.32 × 79,086.62
4. Step 4: Simplify right side
   139,510.39x = 15,225,781,390.12
5. Step 5: Solve for x
   x = 15,225,781,390.12/139,510.39
6. Step 6: Final answer
   x = 109,137.26