Finding the Fourth Proportional to 1,339.69, 2,007.48 and 791.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.69 : 2,007.48 = 791.27 : x
2. Step 2: Convert to fraction form
   1,339.69/2,007.48 = 791.27/x
3. Step 3: Cross multiply
   1,339.69x = 2,007.48 × 791.27
4. Step 4: Simplify right side
   1,339.69x = 1,588,459.16
5. Step 5: Solve for x
   x = 1,588,459.16/1,339.69
6. Step 6: Final answer
   x = 1,185.69