Finding the Fourth Proportional to 1,040.28, 1,435.29 and 708.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.28 : 1,435.29 = 708.12 : x
2. Step 2: Convert to fraction form
   1,040.28/1,435.29 = 708.12/x
3. Step 3: Cross multiply
   1,040.28x = 1,435.29 × 708.12
4. Step 4: Simplify right side
   1,040.28x = 1,016,357.55
5. Step 5: Solve for x
   x = 1,016,357.55/1,040.28
6. Step 6: Final answer
   x = 977.00