Finding the Fourth Proportional to 1,168.17, 1,748.61 and 860.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.17 : 1,748.61 = 860.37 : x
2. Step 2: Convert to fraction form
   1,168.17/1,748.61 = 860.37/x
3. Step 3: Cross multiply
   1,168.17x = 1,748.61 × 860.37
4. Step 4: Simplify right side
   1,168.17x = 1,504,451.59
5. Step 5: Solve for x
   x = 1,504,451.59/1,168.17
6. Step 6: Final answer
   x = 1,287.87