Finding the Fourth Proportional to 404,317.52, 558,137.50 and 261,147.38

Step by Step Solution

1. Step 1: Write the proportion equation
   404,317.52 : 558,137.50 = 261,147.38 : x
2. Step 2: Convert to fraction form
   404,317.52/558,137.50 = 261,147.38/x
3. Step 3: Cross multiply
   404,317.52x = 558,137.50 × 261,147.38
4. Step 4: Simplify right side
   404,317.52x = 145,756,145,804.75
5. Step 5: Solve for x
   x = 145,756,145,804.75/404,317.52
6. Step 6: Final answer
   x = 360,499.21