Finding the Fourth Proportional to 739.69, 1,105.52 and 681.31

Step by Step Solution

1. Step 1: Write the proportion equation
   739.69 : 1,105.52 = 681.31 : x
2. Step 2: Convert to fraction form
   739.69/1,105.52 = 681.31/x
3. Step 3: Cross multiply
   739.69x = 1,105.52 × 681.31
4. Step 4: Simplify right side
   739.69x = 753,201.83
5. Step 5: Solve for x
   x = 753,201.83/739.69
6. Step 6: Final answer
   x = 1,018.27