Finding the Fourth Proportional to 3,997.56, 5,997.18 and 1,400.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.56 : 5,997.18 = 1,400.42 : x
2. Step 2: Convert to fraction form
   3,997.56/5,997.18 = 1,400.42/x
3. Step 3: Cross multiply
   3,997.56x = 5,997.18 × 1,400.42
4. Step 4: Simplify right side
   3,997.56x = 8,398,570.82
5. Step 5: Solve for x
   x = 8,398,570.82/3,997.56
6. Step 6: Final answer
   x = 2,100.92