Finding the Fourth Proportional to 1,581.24, 2,182.56 and 918.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.24 : 2,182.56 = 918.38 : x
2. Step 2: Convert to fraction form
   1,581.24/2,182.56 = 918.38/x
3. Step 3: Cross multiply
   1,581.24x = 2,182.56 × 918.38
4. Step 4: Simplify right side
   1,581.24x = 2,004,419.45
5. Step 5: Solve for x
   x = 2,004,419.45/1,581.24
6. Step 6: Final answer
   x = 1,267.63