Finding the Fourth Proportional to 3,989.49, 5,498.33 and 3,245.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989.49 : 5,498.33 = 3,245.91 : x
2. Step 2: Convert to fraction form
   3,989.49/5,498.33 = 3,245.91/x
3. Step 3: Cross multiply
   3,989.49x = 5,498.33 × 3,245.91
4. Step 4: Simplify right side
   3,989.49x = 17,847,068.10
5. Step 5: Solve for x
   x = 17,847,068.10/3,989.49
6. Step 6: Final answer
   x = 4,473.52