Finding the Fourth Proportional to 1,144.90, 1,580.61 and 791.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.90 : 1,580.61 = 791.34 : x
2. Step 2: Convert to fraction form
   1,144.90/1,580.61 = 791.34/x
3. Step 3: Cross multiply
   1,144.90x = 1,580.61 × 791.34
4. Step 4: Simplify right side
   1,144.90x = 1,250,799.92
5. Step 5: Solve for x
   x = 1,250,799.92/1,144.90
6. Step 6: Final answer
   x = 1,092.50