Finding the Fourth Proportional to 3,993.30, 5,989.83 and 1,219.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,993.30 : 5,989.83 = 1,219.86 : x
2. Step 2: Convert to fraction form
   3,993.30/5,989.83 = 1,219.86/x
3. Step 3: Cross multiply
   3,993.30x = 5,989.83 × 1,219.86
4. Step 4: Simplify right side
   3,993.30x = 7,306,754.02
5. Step 5: Solve for x
   x = 7,306,754.02/3,993.30
6. Step 6: Final answer
   x = 1,829.75