Finding the Fourth Proportional to 5,810.79, 8,018.89 and 3,158.21

Step by Step Solution

1. Step 1: Write the proportion equation
   5,810.79 : 8,018.89 = 3,158.21 : x
2. Step 2: Convert to fraction form
   5,810.79/8,018.89 = 3,158.21/x
3. Step 3: Cross multiply
   5,810.79x = 8,018.89 × 3,158.21
4. Step 4: Simplify right side
   5,810.79x = 25,325,338.59
5. Step 5: Solve for x
   x = 25,325,338.59/5,810.79
6. Step 6: Final answer
   x = 4,358.33