Finding the Fourth Proportional to 3,855.21, 5,784.66 and 3,692.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,855.21 : 5,784.66 = 3,692.72 : x
2. Step 2: Convert to fraction form
   3,855.21/5,784.66 = 3,692.72/x
3. Step 3: Cross multiply
   3,855.21x = 5,784.66 × 3,692.72
4. Step 4: Simplify right side
   3,855.21x = 21,361,100.75
5. Step 5: Solve for x
   x = 21,361,100.75/3,855.21
6. Step 6: Final answer
   x = 5,540.84