Finding the Fourth Proportional to 139,401, 192,374.28 and 75,738.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,401 : 192,374.28 = 75,738.78 : x
2. Step 2: Convert to fraction form
   139,401/192,374.28 = 75,738.78/x
3. Step 3: Cross multiply
   139,401x = 192,374.28 × 75,738.78
4. Step 4: Simplify right side
   139,401x = 14,570,193,270.58
5. Step 5: Solve for x
   x = 14,570,193,270.58/139,401
6. Step 6: Final answer
   x = 104,520.01