Finding the Fourth Proportional to 1,100.96, 1,518.42 and 935.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.96 : 1,518.42 = 935.72 : x
2. Step 2: Convert to fraction form
   1,100.96/1,518.42 = 935.72/x
3. Step 3: Cross multiply
   1,100.96x = 1,518.42 × 935.72
4. Step 4: Simplify right side
   1,100.96x = 1,420,815.96
5. Step 5: Solve for x
   x = 1,420,815.96/1,100.96
6. Step 6: Final answer
   x = 1,290.52