Finding the Fourth Proportional to 1,528.52, 2,109.35 and 865.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.52 : 2,109.35 = 865.43 : x
2. Step 2: Convert to fraction form
   1,528.52/2,109.35 = 865.43/x
3. Step 3: Cross multiply
   1,528.52x = 2,109.35 × 865.43
4. Step 4: Simplify right side
   1,528.52x = 1,825,500.04
5. Step 5: Solve for x
   x = 1,825,500.04/1,528.52
6. Step 6: Final answer
   x = 1,194.29