Finding the Fourth Proportional to 1,040.15, 1,435.23 and 647.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.15 : 1,435.23 = 647.03 : x
2. Step 2: Convert to fraction form
   1,040.15/1,435.23 = 647.03/x
3. Step 3: Cross multiply
   1,040.15x = 1,435.23 × 647.03
4. Step 4: Simplify right side
   1,040.15x = 928,629.69
5. Step 5: Solve for x
   x = 928,629.69/1,040.15
6. Step 6: Final answer
   x = 892.79