Finding the Fourth Proportional to 4,115.21, 5,640.89 and 4,059.83

Step by Step Solution

1. Step 1: Write the proportion equation
   4,115.21 : 5,640.89 = 4,059.83 : x
2. Step 2: Convert to fraction form
   4,115.21/5,640.89 = 4,059.83/x
3. Step 3: Cross multiply
   4,115.21x = 5,640.89 × 4,059.83
4. Step 4: Simplify right side
   4,115.21x = 22,901,054.45
5. Step 5: Solve for x
   x = 22,901,054.45/4,115.21
6. Step 6: Final answer
   x = 5,564.98