Finding the Fourth Proportional to 1,396.42, 1,927.38 and 865.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.42 : 1,927.38 = 865.42 : x
2. Step 2: Convert to fraction form
   1,396.42/1,927.38 = 865.42/x
3. Step 3: Cross multiply
   1,396.42x = 1,927.38 × 865.42
4. Step 4: Simplify right side
   1,396.42x = 1,667,993.20
5. Step 5: Solve for x
   x = 1,667,993.20/1,396.42
6. Step 6: Final answer
   x = 1,194.48