Finding the Fourth Proportional to 1,281.52, 1,767.72 and 816.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.52 : 1,767.72 = 816.04 : x
2. Step 2: Convert to fraction form
   1,281.52/1,767.72 = 816.04/x
3. Step 3: Cross multiply
   1,281.52x = 1,767.72 × 816.04
4. Step 4: Simplify right side
   1,281.52x = 1,442,530.23
5. Step 5: Solve for x
   x = 1,442,530.23/1,281.52
6. Step 6: Final answer
   x = 1,125.64