Finding the Fourth Proportional to 1,040.92, 1,437.15 and 709.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.92 : 1,437.15 = 709.72 : x
2. Step 2: Convert to fraction form
   1,040.92/1,437.15 = 709.72/x
3. Step 3: Cross multiply
   1,040.92x = 1,437.15 × 709.72
4. Step 4: Simplify right side
   1,040.92x = 1,019,974.10
5. Step 5: Solve for x
   x = 1,019,974.10/1,040.92
6. Step 6: Final answer
   x = 979.88