Finding the Fourth Proportional to 3,900.89, 5,851.51 and 979.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.89 : 5,851.51 = 979.22 : x
2. Step 2: Convert to fraction form
   3,900.89/5,851.51 = 979.22/x
3. Step 3: Cross multiply
   3,900.89x = 5,851.51 × 979.22
4. Step 4: Simplify right side
   3,900.89x = 5,729,883.92
5. Step 5: Solve for x
   x = 5,729,883.92/3,900.89
6. Step 6: Final answer
   x = 1,468.87