Finding the Fourth Proportional to 1,091.12, 1,504.89 and 760.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.12 : 1,504.89 = 760.05 : x
2. Step 2: Convert to fraction form
   1,091.12/1,504.89 = 760.05/x
3. Step 3: Cross multiply
   1,091.12x = 1,504.89 × 760.05
4. Step 4: Simplify right side
   1,091.12x = 1,143,791.64
5. Step 5: Solve for x
   x = 1,143,791.64/1,091.12
6. Step 6: Final answer
   x = 1,048.28