Finding the Fourth Proportional to 1,449.62, 1,994.52 and 1,408.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.62 : 1,994.52 = 1,408.78 : x
2. Step 2: Convert to fraction form
   1,449.62/1,994.52 = 1,408.78/x
3. Step 3: Cross multiply
   1,449.62x = 1,994.52 × 1,408.78
4. Step 4: Simplify right side
   1,449.62x = 2,809,839.89
5. Step 5: Solve for x
   x = 2,809,839.89/1,449.62
6. Step 6: Final answer
   x = 1,938.33