Finding the Fourth Proportional to 5,405.82, 8,103.16 and 3,921.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,405.82 : 8,103.16 = 3,921.32 : x
2. Step 2: Convert to fraction form
   5,405.82/8,103.16 = 3,921.32/x
3. Step 3: Cross multiply
   5,405.82x = 8,103.16 × 3,921.32
4. Step 4: Simplify right side
   5,405.82x = 31,775,083.37
5. Step 5: Solve for x
   x = 31,775,083.37/5,405.82
6. Step 6: Final answer
   x = 5,877.94