Finding the Fourth Proportional to 639,498.85, 882,508.56 and 353,019.13

Step by Step Solution

1. Step 1: Write the proportion equation
   639,498.85 : 882,508.56 = 353,019.13 : x
2. Step 2: Convert to fraction form
   639,498.85/882,508.56 = 353,019.13/x
3. Step 3: Cross multiply
   639,498.85x = 882,508.56 × 353,019.13
4. Step 4: Simplify right side
   639,498.85x = 311,542,404,068.75
5. Step 5: Solve for x
   x = 311,542,404,068.75/639,498.85
6. Step 6: Final answer
   x = 487,166.48