Finding the Fourth Proportional to 1,528.43, 2,109.32 and 865.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.43 : 2,109.32 = 865.34 : x
2. Step 2: Convert to fraction form
   1,528.43/2,109.32 = 865.34/x
3. Step 3: Cross multiply
   1,528.43x = 2,109.32 × 865.34
4. Step 4: Simplify right side
   1,528.43x = 1,825,264.10
5. Step 5: Solve for x
   x = 1,825,264.10/1,528.43
6. Step 6: Final answer
   x = 1,194.21