Finding the Fourth Proportional to 5,820.31, 8,027.52 and 3,928.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,820.31 : 8,027.52 = 3,928.89 : x
2. Step 2: Convert to fraction form
   5,820.31/8,027.52 = 3,928.89/x
3. Step 3: Cross multiply
   5,820.31x = 8,027.52 × 3,928.89
4. Step 4: Simplify right side
   5,820.31x = 31,539,253.30
5. Step 5: Solve for x
   x = 31,539,253.30/5,820.31
6. Step 6: Final answer
   x = 5,418.83