Finding the Fourth Proportional to 6,465.10, 8,921.55 and 3,951.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,465.10 : 8,921.55 = 3,951.42 : x
2. Step 2: Convert to fraction form
   6,465.10/8,921.55 = 3,951.42/x
3. Step 3: Cross multiply
   6,465.10x = 8,921.55 × 3,951.42
4. Step 4: Simplify right side
   6,465.10x = 35,252,791.10
5. Step 5: Solve for x
   x = 35,252,791.10/6,465.10
6. Step 6: Final answer
   x = 5,452.78