Finding the Fourth Proportional to 3,978.96, 5,968.04 and 1,057.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.96 : 5,968.04 = 1,057.56 : x
2. Step 2: Convert to fraction form
   3,978.96/5,968.04 = 1,057.56/x
3. Step 3: Cross multiply
   3,978.96x = 5,968.04 × 1,057.56
4. Step 4: Simplify right side
   3,978.96x = 6,311,560.38
5. Step 5: Solve for x
   x = 6,311,560.38/3,978.96
6. Step 6: Final answer
   x = 1,586.23