Finding the Fourth Proportional to 2,289.21, 3,158.98 and 1,294.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.21 : 3,158.98 = 1,294.42 : x
2. Step 2: Convert to fraction form
   2,289.21/3,158.98 = 1,294.42/x
3. Step 3: Cross multiply
   2,289.21x = 3,158.98 × 1,294.42
4. Step 4: Simplify right side
   2,289.21x = 4,089,046.89
5. Step 5: Solve for x
   x = 4,089,046.89/2,289.21
6. Step 6: Final answer
   x = 1,786.23