Finding the Fourth Proportional to 1,386.45, 1,913.31 and 797.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.45 : 1,913.31 = 797.04 : x
2. Step 2: Convert to fraction form
   1,386.45/1,913.31 = 797.04/x
3. Step 3: Cross multiply
   1,386.45x = 1,913.31 × 797.04
4. Step 4: Simplify right side
   1,386.45x = 1,524,984.60
5. Step 5: Solve for x
   x = 1,524,984.60/1,386.45
6. Step 6: Final answer
   x = 1,099.92