Finding the Fourth Proportional to 1,040.61, 1,435.73 and 729.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.61 : 1,435.73 = 729.57 : x
2. Step 2: Convert to fraction form
   1,040.61/1,435.73 = 729.57/x
3. Step 3: Cross multiply
   1,040.61x = 1,435.73 × 729.57
4. Step 4: Simplify right side
   1,040.61x = 1,047,461.89
5. Step 5: Solve for x
   x = 1,047,461.89/1,040.61
6. Step 6: Final answer
   x = 1,006.58