Finding the Fourth Proportional to 6,621.89, 9,139.02 and 3,827.39

Step by Step Solution

1. Step 1: Write the proportion equation
   6,621.89 : 9,139.02 = 3,827.39 : x
2. Step 2: Convert to fraction form
   6,621.89/9,139.02 = 3,827.39/x
3. Step 3: Cross multiply
   6,621.89x = 9,139.02 × 3,827.39
4. Step 4: Simplify right side
   6,621.89x = 34,978,606.65
5. Step 5: Solve for x
   x = 34,978,606.65/6,621.89
6. Step 6: Final answer
   x = 5,282.27