Finding the Fourth Proportional to 3,869.61, 5,804.22 and 3,641.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,869.61 : 5,804.22 = 3,641.31 : x
2. Step 2: Convert to fraction form
   3,869.61/5,804.22 = 3,641.31/x
3. Step 3: Cross multiply
   3,869.61x = 5,804.22 × 3,641.31
4. Step 4: Simplify right side
   3,869.61x = 21,134,964.33
5. Step 5: Solve for x
   x = 21,134,964.33/3,869.61
6. Step 6: Final answer
   x = 5,461.78