Finding the Fourth Proportional to 1,581.58, 2,182.58 and 918.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.58 : 2,182.58 = 918.82 : x
2. Step 2: Convert to fraction form
   1,581.58/2,182.58 = 918.82/x
3. Step 3: Cross multiply
   1,581.58x = 2,182.58 × 918.82
4. Step 4: Simplify right side
   1,581.58x = 2,005,398.16
5. Step 5: Solve for x
   x = 2,005,398.16/1,581.58
6. Step 6: Final answer
   x = 1,267.97