Finding the Fourth Proportional to 139,419, 192,399.39 and 75,756.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,419 : 192,399.39 = 75,756.80 : x
2. Step 2: Convert to fraction form
   139,419/192,399.39 = 75,756.80/x
3. Step 3: Cross multiply
   139,419x = 192,399.39 × 75,756.80
4. Step 4: Simplify right side
   139,419x = 14,575,562,108.35
5. Step 5: Solve for x
   x = 14,575,562,108.35/139,419
6. Step 6: Final answer
   x = 104,545.02