Finding the Fourth Proportional to 5,641.52, 8,452.94 and 3,989.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,641.52 : 8,452.94 = 3,989.88 : x
2. Step 2: Convert to fraction form
   5,641.52/8,452.94 = 3,989.88/x
3. Step 3: Cross multiply
   5,641.52x = 8,452.94 × 3,989.88
4. Step 4: Simplify right side
   5,641.52x = 33,726,196.30
5. Step 5: Solve for x
   x = 33,726,196.30/5,641.52
6. Step 6: Final answer
   x = 5,978.22