Finding the Fourth Proportional to 139,728.96, 192,458.52 and 107,401.68

Step by Step Solution

1. Step 1: Write the proportion equation
   139,728.96 : 192,458.52 = 107,401.68 : x
2. Step 2: Convert to fraction form
   139,728.96/192,458.52 = 107,401.68/x
3. Step 3: Cross multiply
   139,728.96x = 192,458.52 × 107,401.68
4. Step 4: Simplify right side
   139,728.96x = 20,670,368,378.31
5. Step 5: Solve for x
   x = 20,670,368,378.31/139,728.96
6. Step 6: Final answer
   x = 147,931.88