Finding the Fourth Proportional to 1,328.52, 1,992.27 and 404.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.52 : 1,992.27 = 404.34 : x
2. Step 2: Convert to fraction form
   1,328.52/1,992.27 = 404.34/x
3. Step 3: Cross multiply
   1,328.52x = 1,992.27 × 404.34
4. Step 4: Simplify right side
   1,328.52x = 805,554.45
5. Step 5: Solve for x
   x = 805,554.45/1,328.52
6. Step 6: Final answer
   x = 606.35