Finding the Fourth Proportional to 2,221.29, 3,064.37 and 1,289.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.29 : 3,064.37 = 1,289.25 : x
2. Step 2: Convert to fraction form
   2,221.29/3,064.37 = 1,289.25/x
3. Step 3: Cross multiply
   2,221.29x = 3,064.37 × 1,289.25
4. Step 4: Simplify right side
   2,221.29x = 3,950,732.58
5. Step 5: Solve for x
   x = 3,950,732.58/2,221.29
6. Step 6: Final answer
   x = 1,778.58