Finding the Fourth Proportional to 4,978.80, 7,469.22 and 4,162.78

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.80 : 7,469.22 = 4,162.78 : x
2. Step 2: Convert to fraction form
   4,978.80/7,469.22 = 4,162.78/x
3. Step 3: Cross multiply
   4,978.80x = 7,469.22 × 4,162.78
4. Step 4: Simplify right side
   4,978.80x = 31,092,702.56
5. Step 5: Solve for x
   x = 31,092,702.56/4,978.80
6. Step 6: Final answer
   x = 6,245.02