Finding the Fourth Proportional to 639,488.31, 882,495.98 and 353,007.71

Step by Step Solution

1. Step 1: Write the proportion equation
   639,488.31 : 882,495.98 = 353,007.71 : x
2. Step 2: Convert to fraction form
   639,488.31/882,495.98 = 353,007.71/x
3. Step 3: Cross multiply
   639,488.31x = 882,495.98 × 353,007.71
4. Step 4: Simplify right side
   639,488.31x = 311,527,881,012.73
5. Step 5: Solve for x
   x = 311,527,881,012.73/639,488.31
6. Step 6: Final answer
   x = 487,151.80