Finding the Fourth Proportional to 3,978.55, 5,493.54 and 3,231.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.55 : 5,493.54 = 3,231.34 : x
2. Step 2: Convert to fraction form
   3,978.55/5,493.54 = 3,231.34/x
3. Step 3: Cross multiply
   3,978.55x = 5,493.54 × 3,231.34
4. Step 4: Simplify right side
   3,978.55x = 17,751,495.54
5. Step 5: Solve for x
   x = 17,751,495.54/3,978.55
6. Step 6: Final answer
   x = 4,461.80