Finding the Fourth Proportional to 639,413.98, 882,391.38 and 352,934.15

Step by Step Solution

1. Step 1: Write the proportion equation
   639,413.98 : 882,391.38 = 352,934.15 : x
2. Step 2: Convert to fraction form
   639,413.98/882,391.38 = 352,934.15/x
3. Step 3: Cross multiply
   639,413.98x = 882,391.38 × 352,934.15
4. Step 4: Simplify right side
   639,413.98x = 311,426,051,667.63
5. Step 5: Solve for x
   x = 311,426,051,667.63/639,413.98
6. Step 6: Final answer
   x = 487,049.18