Finding the Fourth Proportional to 510,860.88, 705,009.89 and 284,506.38

Step by Step Solution

1. Step 1: Write the proportion equation
   510,860.88 : 705,009.89 = 284,506.38 : x
2. Step 2: Convert to fraction form
   510,860.88/705,009.89 = 284,506.38/x
3. Step 3: Cross multiply
   510,860.88x = 705,009.89 × 284,506.38
4. Step 4: Simplify right side
   510,860.88x = 200,579,811,668.10
5. Step 5: Solve for x
   x = 200,579,811,668.10/510,860.88
6. Step 6: Final answer
   x = 392,630.99