Finding the Fourth Proportional to 400,594.83, 553,195.59 and 257,603.31

Step by Step Solution

1. Step 1: Write the proportion equation
   400,594.83 : 553,195.59 = 257,603.31 : x
2. Step 2: Convert to fraction form
   400,594.83/553,195.59 = 257,603.31/x
3. Step 3: Cross multiply
   400,594.83x = 553,195.59 × 257,603.31
4. Step 4: Simplify right side
   400,594.83x = 142,505,015,061.40
5. Step 5: Solve for x
   x = 142,505,015,061.40/400,594.83
6. Step 6: Final answer
   x = 355,733.54