Finding the Fourth Proportional to 1,581.56, 2,182.29 and 918.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.56 : 2,182.29 = 918.29 : x
2. Step 2: Convert to fraction form
   1,581.56/2,182.29 = 918.29/x
3. Step 3: Cross multiply
   1,581.56x = 2,182.29 × 918.29
4. Step 4: Simplify right side
   1,581.56x = 2,003,975.08
5. Step 5: Solve for x
   x = 2,003,975.08/1,581.56
6. Step 6: Final answer
   x = 1,267.09