Finding the Fourth Proportional to 5,714.12, 8,571.72 and 3,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,714.12 : 8,571.72 = 3,978.56 : x
2. Step 2: Convert to fraction form
   5,714.12/8,571.72 = 3,978.56/x
3. Step 3: Cross multiply
   5,714.12x = 8,571.72 × 3,978.56
4. Step 4: Simplify right side
   5,714.12x = 34,103,102.32
5. Step 5: Solve for x
   x = 34,103,102.32/5,714.12
6. Step 6: Final answer
   x = 5,968.22