Finding the Fourth Proportional to 139,451.82, 192,443.91 and 75,789.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,451.82 : 192,443.91 = 75,789.87 : x
2. Step 2: Convert to fraction form
   139,451.82/192,443.91 = 75,789.87/x
3. Step 3: Cross multiply
   139,451.82x = 192,443.91 × 75,789.87
4. Step 4: Simplify right side
   139,451.82x = 14,585,298,921.19
5. Step 5: Solve for x
   x = 14,585,298,921.19/139,451.82
6. Step 6: Final answer
   x = 104,590.24