Finding the Fourth Proportional to 426,083.69, 639,124.73 and 248,466.15

Step by Step Solution

1. Step 1: Write the proportion equation
   426,083.69 : 639,124.73 = 248,466.15 : x
2. Step 2: Convert to fraction form
   426,083.69/639,124.73 = 248,466.15/x
3. Step 3: Cross multiply
   426,083.69x = 639,124.73 × 248,466.15
4. Step 4: Simplify right side
   426,083.69x = 158,800,860,722.31
5. Step 5: Solve for x
   x = 158,800,860,722.31/426,083.69
6. Step 6: Final answer
   x = 372,698.75