Finding the Fourth Proportional to 6,245.89, 8,619.54 and 4,123.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,245.89 : 8,619.54 = 4,123.28 : x
2. Step 2: Convert to fraction form
   6,245.89/8,619.54 = 4,123.28/x
3. Step 3: Cross multiply
   6,245.89x = 8,619.54 × 4,123.28
4. Step 4: Simplify right side
   6,245.89x = 35,540,776.89
5. Step 5: Solve for x
   x = 35,540,776.89/6,245.89
6. Step 6: Final answer
   x = 5,690.27