Finding the Fourth Proportional to 263,404.60, 395,105.82 and 105,520.12

Step by Step Solution

1. Step 1: Write the proportion equation
   263,404.60 : 395,105.82 = 105,520.12 : x
2. Step 2: Convert to fraction form
   263,404.60/395,105.82 = 105,520.12/x
3. Step 3: Cross multiply
   263,404.60x = 395,105.82 × 105,520.12
4. Step 4: Simplify right side
   263,404.60x = 41,691,613,539.10
5. Step 5: Solve for x
   x = 41,691,613,539.10/263,404.60
6. Step 6: Final answer
   x = 158,279.75