Finding the Fourth Proportional to 1,443.80, 1,994.28 and 1,361.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.80 : 1,994.28 = 1,361.72 : x
2. Step 2: Convert to fraction form
   1,443.80/1,994.28 = 1,361.72/x
3. Step 3: Cross multiply
   1,443.80x = 1,994.28 × 1,361.72
4. Step 4: Simplify right side
   1,443.80x = 2,715,650.96
5. Step 5: Solve for x
   x = 2,715,650.96/1,443.80
6. Step 6: Final answer
   x = 1,880.91