Finding the Fourth Proportional to 139,162.28, 192,031.02 and 78,737.49

Step by Step Solution

1. Step 1: Write the proportion equation
   139,162.28 : 192,031.02 = 78,737.49 : x
2. Step 2: Convert to fraction form
   139,162.28/192,031.02 = 78,737.49/x
3. Step 3: Cross multiply
   139,162.28x = 192,031.02 × 78,737.49
4. Step 4: Simplify right side
   139,162.28x = 15,120,040,516.94
5. Step 5: Solve for x
   x = 15,120,040,516.94/139,162.28
6. Step 6: Final answer
   x = 108,650.43