Finding the Fourth Proportional to 5,820.28, 8,728.82 and 3,971.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,820.28 : 8,728.82 = 3,971.04 : x
2. Step 2: Convert to fraction form
   5,820.28/8,728.82 = 3,971.04/x
3. Step 3: Cross multiply
   5,820.28x = 8,728.82 × 3,971.04
4. Step 4: Simplify right side
   5,820.28x = 34,662,493.37
5. Step 5: Solve for x
   x = 34,662,493.37/5,820.28
6. Step 6: Final answer
   x = 5,955.47