Finding the Fourth Proportional to 1,528.39, 2,109.27 and 865.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.39 : 2,109.27 = 865.27 : x
2. Step 2: Convert to fraction form
   1,528.39/2,109.27 = 865.27/x
3. Step 3: Cross multiply
   1,528.39x = 2,109.27 × 865.27
4. Step 4: Simplify right side
   1,528.39x = 1,825,088.05
5. Step 5: Solve for x
   x = 1,825,088.05/1,528.39
6. Step 6: Final answer
   x = 1,194.12