Finding the Fourth Proportional to 1,339.34, 2,008.61 and 791.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.34 : 2,008.61 = 791.38 : x
2. Step 2: Convert to fraction form
   1,339.34/2,008.61 = 791.38/x
3. Step 3: Cross multiply
   1,339.34x = 2,008.61 × 791.38
4. Step 4: Simplify right side
   1,339.34x = 1,589,559.78
5. Step 5: Solve for x
   x = 1,589,559.78/1,339.34
6. Step 6: Final answer
   x = 1,186.82