Finding the Fourth Proportional to 1,108.27, 1,530 and 859.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.27 : 1,530 = 859.03 : x
2. Step 2: Convert to fraction form
   1,108.27/1,530 = 859.03/x
3. Step 3: Cross multiply
   1,108.27x = 1,530 × 859.03
4. Step 4: Simplify right side
   1,108.27x = 1,314,315.90
5. Step 5: Solve for x
   x = 1,314,315.90/1,108.27
6. Step 6: Final answer
   x = 1,185.92