Finding the Fourth Proportional to 1,105.52, 1,659.51 and 558.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.52 : 1,659.51 = 558.18 : x
2. Step 2: Convert to fraction form
   1,105.52/1,659.51 = 558.18/x
3. Step 3: Cross multiply
   1,105.52x = 1,659.51 × 558.18
4. Step 4: Simplify right side
   1,105.52x = 926,305.29
5. Step 5: Solve for x
   x = 926,305.29/1,105.52
6. Step 6: Final answer
   x = 837.89