Finding the Fourth Proportional to 6,404.90, 8,840.18 and 4,162.88

Step by Step Solution

1. Step 1: Write the proportion equation
   6,404.90 : 8,840.18 = 4,162.88 : x
2. Step 2: Convert to fraction form
   6,404.90/8,840.18 = 4,162.88/x
3. Step 3: Cross multiply
   6,404.90x = 8,840.18 × 4,162.88
4. Step 4: Simplify right side
   6,404.90x = 36,800,608.52
5. Step 5: Solve for x
   x = 36,800,608.52/6,404.90
6. Step 6: Final answer
   x = 5,745.70