Finding the Fourth Proportional to 263,081.83, 394,500.05 and 136,688.09

Step by Step Solution

1. Step 1: Write the proportion equation
   263,081.83 : 394,500.05 = 136,688.09 : x
2. Step 2: Convert to fraction form
   263,081.83/394,500.05 = 136,688.09/x
3. Step 3: Cross multiply
   263,081.83x = 394,500.05 × 136,688.09
4. Step 4: Simplify right side
   263,081.83x = 53,923,459,667.37
5. Step 5: Solve for x
   x = 53,923,459,667.37/263,081.83
6. Step 6: Final answer
   x = 204,968.39