Finding the Fourth Proportional to 1,408.80, 1,940.37 and 1,222.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.80 : 1,940.37 = 1,222.29 : x
2. Step 2: Convert to fraction form
   1,408.80/1,940.37 = 1,222.29/x
3. Step 3: Cross multiply
   1,408.80x = 1,940.37 × 1,222.29
4. Step 4: Simplify right side
   1,408.80x = 2,371,694.85
5. Step 5: Solve for x
   x = 2,371,694.85/1,408.80
6. Step 6: Final answer
   x = 1,683.49