Finding the Fourth Proportional to 3,840.76, 5,765.15 and 3,404.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,840.76 : 5,765.15 = 3,404.80 : x
2. Step 2: Convert to fraction form
   3,840.76/5,765.15 = 3,404.80/x
3. Step 3: Cross multiply
   3,840.76x = 5,765.15 × 3,404.80
4. Step 4: Simplify right side
   3,840.76x = 19,629,182.72
5. Step 5: Solve for x
   x = 19,629,182.72/3,840.76
6. Step 6: Final answer
   x = 5,110.75