Finding the Fourth Proportional to 3,930.66, 5,391.39 and 3,719.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.66 : 5,391.39 = 3,719.25 : x
2. Step 2: Convert to fraction form
   3,930.66/5,391.39 = 3,719.25/x
3. Step 3: Cross multiply
   3,930.66x = 5,391.39 × 3,719.25
4. Step 4: Simplify right side
   3,930.66x = 20,051,941.20
5. Step 5: Solve for x
   x = 20,051,941.20/3,930.66
6. Step 6: Final answer
   x = 5,101.42