Finding the Fourth Proportional to 5,723.46, 7,890.82 and 4,128.77

Step by Step Solution

1. Step 1: Write the proportion equation
   5,723.46 : 7,890.82 = 4,128.77 : x
2. Step 2: Convert to fraction form
   5,723.46/7,890.82 = 4,128.77/x
3. Step 3: Cross multiply
   5,723.46x = 7,890.82 × 4,128.77
4. Step 4: Simplify right side
   5,723.46x = 32,579,390.30
5. Step 5: Solve for x
   x = 32,579,390.30/5,723.46
6. Step 6: Final answer
   x = 5,692.25