Finding the Fourth Proportional to 5,405.83, 8,103.16 and 3,921.33

Step by Step Solution

1. Step 1: Write the proportion equation
   5,405.83 : 8,103.16 = 3,921.33 : x
2. Step 2: Convert to fraction form
   5,405.83/8,103.16 = 3,921.33/x
3. Step 3: Cross multiply
   5,405.83x = 8,103.16 × 3,921.33
4. Step 4: Simplify right side
   5,405.83x = 31,775,164.40
5. Step 5: Solve for x
   x = 31,775,164.40/5,405.83
6. Step 6: Final answer
   x = 5,877.94