Finding the Fourth Proportional to 3,964.81, 5,471.10 and 3,543.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.81 : 5,471.10 = 3,543.82 : x
2. Step 2: Convert to fraction form
   3,964.81/5,471.10 = 3,543.82/x
3. Step 3: Cross multiply
   3,964.81x = 5,471.10 × 3,543.82
4. Step 4: Simplify right side
   3,964.81x = 19,388,593.60
5. Step 5: Solve for x
   x = 19,388,593.60/3,964.81
6. Step 6: Final answer
   x = 4,890.17