Finding the Fourth Proportional to 3,993.83, 5,991.57 and 1,398.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,993.83 : 5,991.57 = 1,398.59 : x
2. Step 2: Convert to fraction form
   3,993.83/5,991.57 = 1,398.59/x
3. Step 3: Cross multiply
   3,993.83x = 5,991.57 × 1,398.59
4. Step 4: Simplify right side
   3,993.83x = 8,379,749.89
5. Step 5: Solve for x
   x = 8,379,749.89/3,993.83
6. Step 6: Final answer
   x = 2,098.17