Finding the Fourth Proportional to 139,249.43, 208,514.42 and 96,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,249.43 : 208,514.42 = 96,105.50 : x
2. Step 2: Convert to fraction form
   139,249.43/208,514.42 = 96,105.50/x
3. Step 3: Cross multiply
   139,249.43x = 208,514.42 × 96,105.50
4. Step 4: Simplify right side
   139,249.43x = 20,039,382,591.31
5. Step 5: Solve for x
   x = 20,039,382,591.31/139,249.43
6. Step 6: Final answer
   x = 143,909.98