Finding the Fourth Proportional to 1,581.55, 2,182.52 and 918.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.55 : 2,182.52 = 918.43 : x
2. Step 2: Convert to fraction form
   1,581.55/2,182.52 = 918.43/x
3. Step 3: Cross multiply
   1,581.55x = 2,182.52 × 918.43
4. Step 4: Simplify right side
   1,581.55x = 2,004,488.68
5. Step 5: Solve for x
   x = 2,004,488.68/1,581.55
6. Step 6: Final answer
   x = 1,267.42