Finding the Fourth Proportional to 1,528.52, 2,109.24 and 865.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.52 : 2,109.24 = 865.40 : x
2. Step 2: Convert to fraction form
   1,528.52/2,109.24 = 865.40/x
3. Step 3: Cross multiply
   1,528.52x = 2,109.24 × 865.40
4. Step 4: Simplify right side
   1,528.52x = 1,825,336.30
5. Step 5: Solve for x
   x = 1,825,336.30/1,528.52
6. Step 6: Final answer
   x = 1,194.19