Finding the Fourth Proportional to 1,386.31, 1,913.28 and 796.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.31 : 1,913.28 = 796.83 : x
2. Step 2: Convert to fraction form
   1,386.31/1,913.28 = 796.83/x
3. Step 3: Cross multiply
   1,386.31x = 1,913.28 × 796.83
4. Step 4: Simplify right side
   1,386.31x = 1,524,558.90
5. Step 5: Solve for x
   x = 1,524,558.90/1,386.31
6. Step 6: Final answer
   x = 1,099.73