Finding the Fourth Proportional to 1,444.08, 1,993 and 1,398.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.08 : 1,993 = 1,398.72 : x
2. Step 2: Convert to fraction form
   1,444.08/1,993 = 1,398.72/x
3. Step 3: Cross multiply
   1,444.08x = 1,993 × 1,398.72
4. Step 4: Simplify right side
   1,444.08x = 2,787,648.96
5. Step 5: Solve for x
   x = 2,787,648.96/1,444.08
6. Step 6: Final answer
   x = 1,930.40