Finding the Fourth Proportional to 1,144.27, 1,715.82 and 779.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.27 : 1,715.82 = 779.47 : x
2. Step 2: Convert to fraction form
   1,144.27/1,715.82 = 779.47/x
3. Step 3: Cross multiply
   1,144.27x = 1,715.82 × 779.47
4. Step 4: Simplify right side
   1,144.27x = 1,337,430.22
5. Step 5: Solve for x
   x = 1,337,430.22/1,144.27
6. Step 6: Final answer
   x = 1,168.81