Finding the Fourth Proportional to 6,227.55, 8,604.95 and 4,978.89

Step by Step Solution

1. Step 1: Write the proportion equation
   6,227.55 : 8,604.95 = 4,978.89 : x
2. Step 2: Convert to fraction form
   6,227.55/8,604.95 = 4,978.89/x
3. Step 3: Cross multiply
   6,227.55x = 8,604.95 × 4,978.89
4. Step 4: Simplify right side
   6,227.55x = 42,843,074.61
5. Step 5: Solve for x
   x = 42,843,074.61/6,227.55
6. Step 6: Final answer
   x = 6,879.60