Finding the Fourth Proportional to 1,408.04, 1,958.61 and 1,381.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.04 : 1,958.61 = 1,381.31 : x
2. Step 2: Convert to fraction form
   1,408.04/1,958.61 = 1,381.31/x
3. Step 3: Cross multiply
   1,408.04x = 1,958.61 × 1,381.31
4. Step 4: Simplify right side
   1,408.04x = 2,705,447.58
5. Step 5: Solve for x
   x = 2,705,447.58/1,408.04
6. Step 6: Final answer
   x = 1,921.43