Finding the Fourth Proportional to 639,488.43, 882,496.15 and 353,007.83

Step by Step Solution

1. Step 1: Write the proportion equation
   639,488.43 : 882,496.15 = 353,007.83 : x
2. Step 2: Convert to fraction form
   639,488.43/882,496.15 = 353,007.83/x
3. Step 3: Cross multiply
   639,488.43x = 882,496.15 × 353,007.83
4. Step 4: Simplify right side
   639,488.43x = 311,528,052,218.58
5. Step 5: Solve for x
   x = 311,528,052,218.58/639,488.43
6. Step 6: Final answer
   x = 487,151.98