Finding the Fourth Proportional to 639,488.24, 882,499.92 and 353,002.16

Step by Step Solution

1. Step 1: Write the proportion equation
   639,488.24 : 882,499.92 = 353,002.16 : x
2. Step 2: Convert to fraction form
   639,488.24/882,499.92 = 353,002.16/x
3. Step 3: Cross multiply
   639,488.24x = 882,499.92 × 353,002.16
4. Step 4: Simplify right side
   639,488.24x = 311,524,377,959.83
5. Step 5: Solve for x
   x = 311,524,377,959.83/639,488.24
6. Step 6: Final answer
   x = 487,146.37