Finding the Fourth Proportional to 2,215.54, 3,322.25 and 1,291.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.54 : 3,322.25 = 1,291.36 : x
2. Step 2: Convert to fraction form
   2,215.54/3,322.25 = 1,291.36/x
3. Step 3: Cross multiply
   2,215.54x = 3,322.25 × 1,291.36
4. Step 4: Simplify right side
   2,215.54x = 4,290,223.30
5. Step 5: Solve for x
   x = 4,290,223.30/2,215.54
6. Step 6: Final answer
   x = 1,936.43