Finding the Fourth Proportional to 404,308.85, 605,971.33 and 286,014.29

Step by Step Solution

1. Step 1: Write the proportion equation
   404,308.85 : 605,971.33 = 286,014.29 : x
2. Step 2: Convert to fraction form
   404,308.85/605,971.33 = 286,014.29/x
3. Step 3: Cross multiply
   404,308.85x = 605,971.33 × 286,014.29
4. Step 4: Simplify right side
   404,308.85x = 173,316,455,965.41
5. Step 5: Solve for x
   x = 173,316,455,965.41/404,308.85
6. Step 6: Final answer
   x = 428,673.42