Finding the Fourth Proportional to 400,856.92, 552,916.72 and 257,797.96

Step by Step Solution

1. Step 1: Write the proportion equation
   400,856.92 : 552,916.72 = 257,797.96 : x
2. Step 2: Convert to fraction form
   400,856.92/552,916.72 = 257,797.96/x
3. Step 3: Cross multiply
   400,856.92x = 552,916.72 × 257,797.96
4. Step 4: Simplify right side
   400,856.92x = 142,540,802,465.89
5. Step 5: Solve for x
   x = 142,540,802,465.89/400,856.92
6. Step 6: Final answer
   x = 355,590.23