Finding the Fourth Proportional to 863,978.91, 1,296,546.83 and 358,540.38

Step by Step Solution

1. Step 1: Write the proportion equation
   863,978.91 : 1,296,546.83 = 358,540.38 : x
2. Step 2: Convert to fraction form
   863,978.91/1,296,546.83 = 358,540.38/x
3. Step 3: Cross multiply
   863,978.91x = 1,296,546.83 × 358,540.38
4. Step 4: Simplify right side
   863,978.91x = 464,864,391,323.29
5. Step 5: Solve for x
   x = 464,864,391,323.29/863,978.91
6. Step 6: Final answer
   x = 538,050.62