Finding the Fourth Proportional to 1,528.49, 2,109.12 and 865.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.49 : 2,109.12 = 865.33 : x
2. Step 2: Convert to fraction form
   1,528.49/2,109.12 = 865.33/x
3. Step 3: Cross multiply
   1,528.49x = 2,109.12 × 865.33
4. Step 4: Simplify right side
   1,528.49x = 1,825,076.29
5. Step 5: Solve for x
   x = 1,825,076.29/1,528.49
6. Step 6: Final answer
   x = 1,194.04