Finding the Fourth Proportional to 6,419.25, 8,857.69 and 3,586.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,419.25 : 8,857.69 = 3,586.28 : x
2. Step 2: Convert to fraction form
   6,419.25/8,857.69 = 3,586.28/x
3. Step 3: Cross multiply
   6,419.25x = 8,857.69 × 3,586.28
4. Step 4: Simplify right side
   6,419.25x = 31,766,156.49
5. Step 5: Solve for x
   x = 31,766,156.49/6,419.25
6. Step 6: Final answer
   x = 4,948.58