Finding the Fourth Proportional to 1,385.69, 1,912.28 and 796.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.69 : 1,912.28 = 796.23 : x
2. Step 2: Convert to fraction form
   1,385.69/1,912.28 = 796.23/x
3. Step 3: Cross multiply
   1,385.69x = 1,912.28 × 796.23
4. Step 4: Simplify right side
   1,385.69x = 1,522,610.72
5. Step 5: Solve for x
   x = 1,522,610.72/1,385.69
6. Step 6: Final answer
   x = 1,098.81