Finding the Fourth Proportional to 404,990.37, 554,029.72 and 403,284.51

Step by Step Solution

1. Step 1: Write the proportion equation
   404,990.37 : 554,029.72 = 403,284.51 : x
2. Step 2: Convert to fraction form
   404,990.37/554,029.72 = 403,284.51/x
3. Step 3: Cross multiply
   404,990.37x = 554,029.72 × 403,284.51
4. Step 4: Simplify right side
   404,990.37x = 223,431,603,147.43
5. Step 5: Solve for x
   x = 223,431,603,147.43/404,990.37
6. Step 6: Final answer
   x = 551,696.09