Finding the Fourth Proportional to 3,985.37, 5,979.12 and 3,549.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.37 : 5,979.12 = 3,549.61 : x
2. Step 2: Convert to fraction form
   3,985.37/5,979.12 = 3,549.61/x
3. Step 3: Cross multiply
   3,985.37x = 5,979.12 × 3,549.61
4. Step 4: Simplify right side
   3,985.37x = 21,223,544.14
5. Step 5: Solve for x
   x = 21,223,544.14/3,985.37
6. Step 6: Final answer
   x = 5,325.36