Finding the Fourth Proportional to 1,040.34, 1,435.42 and 760.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.34 : 1,435.42 = 760.72 : x
2. Step 2: Convert to fraction form
   1,040.34/1,435.42 = 760.72/x
3. Step 3: Cross multiply
   1,040.34x = 1,435.42 × 760.72
4. Step 4: Simplify right side
   1,040.34x = 1,091,952.70
5. Step 5: Solve for x
   x = 1,091,952.70/1,040.34
6. Step 6: Final answer
   x = 1,049.61