Finding the Fourth Proportional to 139,451.37, 192,442.89 and 75,789.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,451.37 : 192,442.89 = 75,789.15 : x
2. Step 2: Convert to fraction form
   139,451.37/192,442.89 = 75,789.15/x
3. Step 3: Cross multiply
   139,451.37x = 192,442.89 × 75,789.15
4. Step 4: Simplify right side
   139,451.37x = 14,585,083,056.64
5. Step 5: Solve for x
   x = 14,585,083,056.64/139,451.37
6. Step 6: Final answer
   x = 104,589.03