Finding the Fourth Proportional to 1,085.22, 1,497.61 and 659.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.22 : 1,497.61 = 659.72 : x
2. Step 2: Convert to fraction form
   1,085.22/1,497.61 = 659.72/x
3. Step 3: Cross multiply
   1,085.22x = 1,497.61 × 659.72
4. Step 4: Simplify right side
   1,085.22x = 988,003.27
5. Step 5: Solve for x
   x = 988,003.27/1,085.22
6. Step 6: Final answer
   x = 910.42