Finding the Fourth Proportional to 1,440.52, 1,987.88 and 819.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.52 : 1,987.88 = 819.52 : x
2. Step 2: Convert to fraction form
   1,440.52/1,987.88 = 819.52/x
3. Step 3: Cross multiply
   1,440.52x = 1,987.88 × 819.52
4. Step 4: Simplify right side
   1,440.52x = 1,629,107.42
5. Step 5: Solve for x
   x = 1,629,107.42/1,440.52
6. Step 6: Final answer
   x = 1,130.92