Finding the Fourth Proportional to 890.01, 1,228.79 and 796.59

Step by Step Solution

1. Step 1: Write the proportion equation
   890.01 : 1,228.79 = 796.59 : x
2. Step 2: Convert to fraction form
   890.01/1,228.79 = 796.59/x
3. Step 3: Cross multiply
   890.01x = 1,228.79 × 796.59
4. Step 4: Simplify right side
   890.01x = 978,839.83
5. Step 5: Solve for x
   x = 978,839.83/890.01
6. Step 6: Final answer
   x = 1,099.81