Finding the Fourth Proportional to 639,429.72, 882,413.10 and 352,949.88

Step by Step Solution

1. Step 1: Write the proportion equation
   639,429.72 : 882,413.10 = 352,949.88 : x
2. Step 2: Convert to fraction form
   639,429.72/882,413.10 = 352,949.88/x
3. Step 3: Cross multiply
   639,429.72x = 882,413.10 × 352,949.88
4. Step 4: Simplify right side
   639,429.72x = 311,447,597,755.43
5. Step 5: Solve for x
   x = 311,447,597,755.43/639,429.72
6. Step 6: Final answer
   x = 487,070.88