Finding the Fourth Proportional to 3,865.57, 5,757.58 and 3,784.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,865.57 : 5,757.58 = 3,784.57 : x
2. Step 2: Convert to fraction form
   3,865.57/5,757.58 = 3,784.57/x
3. Step 3: Cross multiply
   3,865.57x = 5,757.58 × 3,784.57
4. Step 4: Simplify right side
   3,865.57x = 21,789,964.54
5. Step 5: Solve for x
   x = 21,789,964.54/3,865.57
6. Step 6: Final answer
   x = 5,636.93