Finding the Fourth Proportional to 404,099.05, 557,077.27 and 317,908.34

Step by Step Solution

1. Step 1: Write the proportion equation
   404,099.05 : 557,077.27 = 317,908.34 : x
2. Step 2: Convert to fraction form
   404,099.05/557,077.27 = 317,908.34/x
3. Step 3: Cross multiply
   404,099.05x = 557,077.27 × 317,908.34
4. Step 4: Simplify right side
   404,099.05x = 177,099,510,157.43
5. Step 5: Solve for x
   x = 177,099,510,157.43/404,099.05
6. Step 6: Final answer
   x = 438,257.68