Finding the Fourth Proportional to 3,987.05, 5,495.04 and 3,528.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987.05 : 5,495.04 = 3,528.77 : x
2. Step 2: Convert to fraction form
   3,987.05/5,495.04 = 3,528.77/x
3. Step 3: Cross multiply
   3,987.05x = 5,495.04 × 3,528.77
4. Step 4: Simplify right side
   3,987.05x = 19,390,732.30
5. Step 5: Solve for x
   x = 19,390,732.30/3,987.05
6. Step 6: Final answer
   x = 4,863.43