Finding the Fourth Proportional to 1,399.33, 2,097.78 and 705.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.33 : 2,097.78 = 705.36 : x
2. Step 2: Convert to fraction form
   1,399.33/2,097.78 = 705.36/x
3. Step 3: Cross multiply
   1,399.33x = 2,097.78 × 705.36
4. Step 4: Simplify right side
   1,399.33x = 1,479,690.10
5. Step 5: Solve for x
   x = 1,479,690.10/1,399.33
6. Step 6: Final answer
   x = 1,057.43