Finding the Fourth Proportional to 1,581.18, 2,182.04 and 918.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.18 : 2,182.04 = 918.16 : x
2. Step 2: Convert to fraction form
   1,581.18/2,182.04 = 918.16/x
3. Step 3: Cross multiply
   1,581.18x = 2,182.04 × 918.16
4. Step 4: Simplify right side
   1,581.18x = 2,003,461.85
5. Step 5: Solve for x
   x = 2,003,461.85/1,581.18
6. Step 6: Final answer
   x = 1,267.07