Finding the Fourth Proportional to 1,581.65, 2,182.64 and 918.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.65 : 2,182.64 = 918.48 : x
2. Step 2: Convert to fraction form
   1,581.65/2,182.64 = 918.48/x
3. Step 3: Cross multiply
   1,581.65x = 2,182.64 × 918.48
4. Step 4: Simplify right side
   1,581.65x = 2,004,706.59
5. Step 5: Solve for x
   x = 2,004,706.59/1,581.65
6. Step 6: Final answer
   x = 1,267.48