Finding the Fourth Proportional to 3,986.54, 5,498.32 and 3,538.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.54 : 5,498.32 = 3,538.88 : x
2. Step 2: Convert to fraction form
   3,986.54/5,498.32 = 3,538.88/x
3. Step 3: Cross multiply
   3,986.54x = 5,498.32 × 3,538.88
4. Step 4: Simplify right side
   3,986.54x = 19,457,858.34
5. Step 5: Solve for x
   x = 19,457,858.34/3,986.54
6. Step 6: Final answer
   x = 4,880.89