Finding the Fourth Proportional to 1,128.65, 1,556.70 and 796.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.65 : 1,556.70 = 796.73 : x
2. Step 2: Convert to fraction form
   1,128.65/1,556.70 = 796.73/x
3. Step 3: Cross multiply
   1,128.65x = 1,556.70 × 796.73
4. Step 4: Simplify right side
   1,128.65x = 1,240,269.59
5. Step 5: Solve for x
   x = 1,240,269.59/1,128.65
6. Step 6: Final answer
   x = 1,098.90