Finding the Fourth Proportional to 3,989.50, 5,974.96 and 3,851.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989.50 : 5,974.96 = 3,851.08 : x
2. Step 2: Convert to fraction form
   3,989.50/5,974.96 = 3,851.08/x
3. Step 3: Cross multiply
   3,989.50x = 5,974.96 × 3,851.08
4. Step 4: Simplify right side
   3,989.50x = 23,010,048.96
5. Step 5: Solve for x
   x = 23,010,048.96/3,989.50
6. Step 6: Final answer
   x = 5,767.65