Finding the Fourth Proportional to 404,799.30, 606,680.55 and 310,839.30

Step by Step Solution

1. Step 1: Write the proportion equation
   404,799.30 : 606,680.55 = 310,839.30 : x
2. Step 2: Convert to fraction form
   404,799.30/606,680.55 = 310,839.30/x
3. Step 3: Cross multiply
   404,799.30x = 606,680.55 × 310,839.30
4. Step 4: Simplify right side
   404,799.30x = 188,580,157,485.62
5. Step 5: Solve for x
   x = 188,580,157,485.62/404,799.30
6. Step 6: Final answer
   x = 465,860.88