Finding the Fourth Proportional to 1,145.83, 1,580.52 and 791.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.83 : 1,580.52 = 791.14 : x
2. Step 2: Convert to fraction form
   1,145.83/1,580.52 = 791.14/x
3. Step 3: Cross multiply
   1,145.83x = 1,580.52 × 791.14
4. Step 4: Simplify right side
   1,145.83x = 1,250,412.59
5. Step 5: Solve for x
   x = 1,250,412.59/1,145.83
6. Step 6: Final answer
   x = 1,091.27