Finding the Fourth Proportional to 1,168.20, 1,748.52 and 860.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.20 : 1,748.52 = 860.00 : x
2. Step 2: Convert to fraction form
   1,168.20/1,748.52 = 860.00/x
3. Step 3: Cross multiply
   1,168.20x = 1,748.52 × 860.00
4. Step 4: Simplify right side
   1,168.20x = 1,503,718.46
5. Step 5: Solve for x
   x = 1,503,718.46/1,168.20
6. Step 6: Final answer
   x = 1,287.21